Care guide
Springtails in the Bathroom
The bathroom is where most people first meet springtails: tiny specks jumping around the tub, the sink, or the base of the toilet.
Springtails are tiny soil arthropods, usually under 2 mm. They are named for the furcula — a forked appendage folded under the abdomen that snaps down and flings the animal several times its own body length. That jump is why they get mistaken for fleas, and it is the single biggest source of confusion about them.
They do not bite, do not sting, do not carry disease, and do not damage buildings, furniture or stored food. They eat mould, fungus and decaying organic matter.
Why the Bathroom Specifically
Because it is the wettest room in the house, and because bathrooms hide water in places you cannot see:
- Behind and beneath the tub surround, where old caulk has failed
- Under the sink, from a slow trap or supply-line drip
- Around the toilet base, where a failed wax ring wets the subfloor
- Inside the drain, where organic film builds up and grows the mould they eat
- Under vinyl or tile that has been wet long enough for the substrate to stay damp
What to Actually Do
- Run the extractor fan, longer than feels necessary — during the shower and for a good while after.
- Clean the drains. The biofilm in a drain is a food source; removing it removes the reason to stay.
- Re-caulk anything that has failed around the tub, shower and sink.
- Find the leak. If they persist after the above, water is getting somewhere it should not be. Soft flooring or a musty smell near the toilet is worth a plumber.
They Are a Symptom, Not the Problem
This is the part most pest advice skips. Springtails need moisture to survive and die quickly without it. A population indoors is telling you there is damp somewhere — and that is the actual problem.
Spraying them achieves very little. You kill the ones present, the damp remains, and a new population arrives. Find the water and the springtails leave on their own.
See also springtails vs fleas if you are not sure what you are looking at.