Are you &&^&^$^ with us?! There is absolutely no reason to use a razor knife to remove the air slot trim. In fact, for disassembly it’s only necessary to complete up to the second step. You don’t even have to pull the heating coil out!

Once the upper half is removed, use a long toothbrush to clean the heating coil. Tape a chopstick to a normal toothbrush if you’re desperate. I used a gun cleaning brush. From there some compressed air and a vacuum will finish the job

Hope nobody looses a finger jamming a knife into an area that shouldn’t be messed with…