My dryer had a heavy build-up under the filter area, so much so, that the filter would no longer seat properly. I have used a long dryer brush in the past. Clearly it was not sufficient. When we noticed the problem, I excitedly ran to my Dyson Stick and attached the flexible crevice tool, but it was too short and awkward to insert.
What would have worked perfectly would have been a semi flexible, long, crevice like tool that can be bent to reach into the bottom of the filter area or in extremely tight narrow spaces. Maybe with perforations on the sides as well. Perhaps a line of “Deep Clean” attachments.
And along the same lines…..when are you going to come out with a Shop Vacuum? HEPA in a workshop or garage area is important. Not the counterproductive mess that standard vacs create.