If your handy Dust Buster isn’t picking up the grime like it used to, It could be due to the  static buildup in the canister. You can fix this by cutting a strip from a dryer sheet and sucking it up with the vacuum. Let it swirl around for a few seconds, then turn off, and empty the canister. The suction power should return because the dryer sheet neutralized the static. Another method would be to wipe the inside of the canister and filter with a damp microfiber cloth.