How to judge whether the main brush, edge brush and other accessories should be replaced?

The main brush is used for more than 300 hours, or the bristles fall off
The side brush is used for more than 200 hours, or the bristles fall off

Can these be purchased now?

Not yet. This status update was posted 2 days ago:

1 Like

Do a search for “Xiaomi Mi Mop spare parts”. The parts are identical to the Wyze.
(Except for the mop) :wink: