I am sure we have all noticed the amount of crevices on the front of these F6B's and of course the bugs seem to find every one of them and get deep into them. What are you using to get the bugs out. I have cut down old tooth brushes and have milled a couple of denture brushes down to one line of bristles. But even those are inadequate in some areas. Has anyone discover the a brush that works the best?![]()