Have you tried sifting liners? I'm "test running" litterbox sifting liners to see if it's something I want to use (I use regular liners anyway). The ones I have seem to have holes that are about as big as dime (maybe a little smaller). You put the stack of liners and a solid sheet in the litter box, fill with litter, then secure the loose edges around the box with a giant rubber band.I loved using pine pellets too But when my boys got grown I could not find a large enough sifting box If I ever do I may go back to pine After A Lot of trial and error I am now using Tidy Cat Naturally Strong It has little bits of charcoal in it and i have no problem with odor It comes in unscented and lemongrass Not dusty at all