No. 4 and that LINT BUILD UP! 5 tips to easily deep cleaning your dryer: 1. start with the lint trap! Clean the screen with a vacuum, or vacuums in my case, to get all the trapped lint 2. She looks good, but does she pass the water test? Run the screen underwater and if water passes through easily, you’re good to go! If it pools on top, that means you need tip 3 3. Dryer sheets and fabric softener can leave a film (causing it to not be able to do its job, aka higher risk of a clogged dryer vent)