Not
e: depending on the device use, you may not need to replace if it’s not dirty.
Note: make sure the pre-filter cover is completely dry before use.
(S
uggest to replace once a month)
Remove the pre-filter cover by hand and replace with a new filter cotton.
R
eplace the the pre-filter cover, and it's done successfully.
1. Filter Cotton
(A weekly basis cleaning)
Take off the pre-filter cover and clean it with mild liquid detergent and water.
2. Pre-Filter