How often should I clean makeup brushes?

The AAD suggests cleaning makeup brushes every 7–10 days. Avoid sharing them and let them dry properly. If breakouts continue despite reasonable hygiene, I would look beyond the brushes rather than escalating cleaning into another source of irritation.

Clean tools regularly, but do not blame every breakout on them

Cleaning is useful, but I would not blame every breakout on hygiene; persistent bumps still deserve a review of your products and skin condition.