How to clean therapure tpp100 filter due to its shape the tpp100 also has a slightly different cleaning process compared to the other tpp models at the bottom of the unit unscrew the filter lock mechanism by turning it counter clockwise remove the inlet grill from the unit. The first step is to remove just one filter will be doing one filter at a time in this process next fill a sink with hot water as the sink is filling up well add a small amount of laundry detergent to it it can be a dry or liquid laundry detergent doesnt really matter