a little care in how you slice the grooves helps alot...as one groove will have a debris catch pocket going in and the other groove/grooves angled to catch everything coming out

one slot "cutting" like a tap edge going in...2 cutting slots coming out type deal.

a speed handle, 9/16ths and a flat screwdriver/blowgun let you rocket through cleaning em all...just remember to blow the crud off the bolt outside the garage...