There is no single replacement deadline for every makeup brush. Replace one when the bristles consistently shed, feel rough, lose their shape, will not come clean, or the handle and ferrule become loose.
Look at the condition, not just the age
A well-made brush that is washed gently and dried correctly can remain useful longer than one that is repeatedly soaked. Inspect its bristle tips, shape, handle, and metal joint regularly. Any crack or sharp edge that irritates skin is a reason to stop using it.
Warning signs after washing
A persistent unpleasant odor, residue that will not rinse away, clumps of bristles falling out, or a brush head that detaches are practical replacement signals. If a brush has been contaminated in a way you cannot safely clean, discard it.
Keep brushes in better shape
The American Academy of Dermatology recommends washing brushes every 7 to 10 days. Rinse just the tips in lukewarm water, use gentle shampoo, and lay them flat to dry so water does not loosen the ferrule glue.
Do not share tools
Personal eye and face brushes should not be shared. Clean tools reduce the chance of transferring makeup residue, skin oils, and contaminants between people.
Frequently asked questions
Are expensive brushes always longer-lasting? Not necessarily. Construction, material, use and washing habits matter more than price alone.
Does one stray bristle mean a brush is finished? No. Repeated shedding or structural damage is more concerning than an occasional loose hair.
Source: American Academy of Dermatology — clean makeup brushes.
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