Cleaning a bird feeder: how often and with what
A weekly clean in hot soapy water, complete drying before refilling, what to make of vinegar and bleach, and what to do if birds look ill.
In this guide
A feeder in use is cleaned every week, as the LPO recommends: scrubbing in hot water with Marseille soap or black soap, a thorough rinse, then complete drying before refilling. Gloves, a brush kept only for this job and picking up the seed that has fallen on the ground round the job off. No disinfectant is needed in an ordinary garden: what protects the birds is regularity, not the strength of the product.
Why this job matters more than people think
A feeder gathers in one place birds that, in the wild, would rarely meet. They leave droppings, traces of saliva and half-eaten seed there. The LPO lists four diseases passed on this way: trichomonosis, salmonellosis, avian pox and scaly leg. Trichomonosis hits greenfinches and chaffinches in particular, and an outbreak can cut a garden's local population sharply in a few weeks.
The risk rises with three factors: damp, bird density and the age of the seed. It falls with regular cleaning, with tube feeders that keep the food out of reach of droppings, and with feeding spread over several points, as the guide where to site a bird feeder explains.
How often, depending on the equipment
The benchmark is weekly throughout the period of use. Some items need closer attention.
| Item | Frequency | What to do |
|---|---|---|
| Tube or hopper feeder | Every week | Take fully apart, scrub, rinse, dry |
| Open tray | Every week, and after every spell of rain | Remove wet seed, brush dry then wash |
| Peanut mesh feeder | Every week | Scrub the mesh, empty the debris from the dish |
| Drinker and bath | Water renewed every 2 to 3 days, daily in hot weather or in frost; scrubbed weekly | Brush and clean water, soap only if the deposits hold on |
| Ground under the feeder | Every week | Pick up husks and fallen seed |
Two extra pointers go with this table. During a mild spell in winter, damp and warmth favour germs: tighten the frequency. At the start and end of the season, a deeper clean is called for, before storing as much as before bringing the feeder back into service.
A simple way to hold that rhythm is never to fill a feeder beyond what will be eaten in three or four days. The container then empties by itself, and the cleaning arrives naturally at the moment it is empty, with no seed wasted. A large-capacity feeder filled to the brim does the opposite: it encourages you to let the weeks slip by.
The method, step by step
The kit, and the precautions for yourself
- Gloves, every time. Some of the bacteria involved, salmonella among them, can pass to humans.
- A brush kept only for this job, never the washing-up brush. A stiff-bristled brush for flat surfaces, a bottle brush for the inside of tubes.
- Marseille soap or black soap, and nothing more in the vast majority of cases.
- A bucket and a tap outdoors. The cleaning is done outside, not in the kitchen sink.
- Wash your hands thoroughly once the work is finished.
Feeders that come apart without tools save a great deal of time: a reservoir that separates from its dish can really be scrubbed, unlike a one-piece model where the bottom stays out of reach.
The seven steps, in order
- Empty the feeder completely. Leftover seed does not go back into the bag: anything that has spent several days outdoors goes on the compost or in the bin.
- Take apart whatever can be taken apart: cap, base, dish, perches, reservoir.
- Scrape the stuck-on deposits dry, with a piece of wood or a spatula, before wetting anything. A wetted crust turns into a paste that is hard to shift.
- Wash in hot soapy water, brushing every face. For a tube, run the bottle brush the whole height and work around the ports, where seed cakes together.
- Rinse thoroughly in clean water, until the foam has gone completely. Soap residue makes the seed bitter and can be swallowed.
- Let it dry completely, in the open air, for several hours. A feeder filled while damp goes mouldy in two days and undoes all the work.
- Pick up the husks and fallen seed on the ground, and move the feeding point a metre or two from time to time.
A stainless steel and polycarbonate tube stands up well to this repeated treatment, provided you do not pour boiling water over the clear parts: very hot water is for the timber of a nest box, not the plastic of a feeder.
Four mistakes come up again and again:
- Topping up without emptying. Old seed stays at the bottom and breaks down there, under a layer of fresh seed.
- Rinsing half-heartedly. Soap residue ends up in the food.
- Refilling before it is fully dry. This is the one that cancels out everything else.
- Forgetting the ground. Husks, droppings and sprouted seed build up under the feeder, and birds come and peck there all the same.
Vinegar, bleach, disinfectants: what to make of them
Hot water and soap are enough in a garden where no sick bird has been seen. That is the LPO's position, and it does not recommend disinfectant for routine use.
Diluted white vinegar is an acceptable alternative for lifting limescale from a drinker or deposits from a tray. It calls for careful rinsing and does not replace the scrubbing, which does most of the work.
Bleach has its place in one precise case only: after a confirmed outbreak of disease, on non-porous equipment. It is heavily diluted, rinsed very thoroughly and needs a long drying time. Two absolute rules: never mix it with another product, vinegar included, or toxic gases are given off, and never use it on a drinker, whose water is drunk directly.
To be ruled out in every case: scented household detergents, shop-bought surface disinfectants, and any wood treatment product applied to a feeder in service.
Cleaning a drinker: different rules
A water point is not treated like a feeder. The water is swallowed as it is, and a greenish film forms quickly in the sun.
- Renew the water every two or three days, daily in hot weather and in frosty weather alike.
- Scrub the bowl once a week with clean water. Soap is only called for if the deposits hold on, and it is then rinsed off very carefully.
- No bleach, no algicide, no salt and no antifreeze in winter: these products are dangerous to birds.
- Empty a stoneware or ceramic bowl in a hard frost, which ice can crack, and put water back in the morning.
The choice of container, its depth and its position are set out in detail in the guide a water point for birds.
When birds look ill
A bird that sits still, fluffed up and listless, that struggles to swallow or that stays on the ground near the feeder should raise the alarm. The course of action the LPO recommends is clear-cut:
- Stop all feeding for four weeks, so that the birds disperse and stop infecting each other.
- Throw away the seed and water that may be contaminated.
- Clean all the equipment carefully, wearing gloves, before putting it away.
- Ask a bird protection charity for advice; they can identify the disease and say what to do next.
Cleaning nest boxes follows a different calendar: it is done once a year, after the breeding season, and never during nesting. The method is described in cleaning a nest box. For the rest of the feeding calendar, see feeding birds in winter.
Feeders, seed hoppers, seed and drinkers are gathered in the Birds section.
Sources
Frequently asked questions
Can a bird feeder go in the dishwasher?
It is not advisable. Wooden parts will not take it, the heat can warp plastic, and equipment meant for birds should not share the household dishwasher for hygiene reasons. Washing it by hand outdoors, in hot soapy water with a brush, remains the right method.
Should a feeder be cleaned before it is stored at the end of the season?
Yes, and it is the most important clean of the year. Take it fully apart, wash it, rinse it and let it dry for several days before storing it somewhere dry. A feeder put away damp goes mouldy over the summer and starts the next winter with a microbial load already in place.
What should be done with the seed left in the feeder?
Seed that is dry and clean can be used up over the following days, but it never goes back into the storage bag. As soon as it is damp, caked, dusty or marked with droppings, it is thrown away. Mouldy seed can produce toxins that are dangerous to birds.
Is a wooden feeder cleaned the same way as a metal one?
The principle is the same, the caution differs. Wood is porous: brush it without soaking it, avoid leaving it to steep and allow longer for drying. Do not treat it with varnish or wood stain. Metal and glass, being non-porous, can be washed and rinsed more freely.
