I sand towards the phenolic and not back over the maple, using a different section of the sandpaper with each pass. I only sand the wood to 320 anyway and the coarser sandpapers won't trap the dust like the fine ones will.
I go back and resand my rings only because of the silver to 600. Any inlays that have silver, I'll also sand to 600 or 1000 without the cue spinning.
You can also blow air while sanding, but I don't have enough hands to hold the air hose and the sandpaper. Denatured Alcohol will clean some out too.