Yes, cleaning your floor after sanding is a crucial step before applying any finish. After vacuuming and wiping away loose dust, use a damp (not wet) microfiber mop to go over the entire surface. This helps pick up the remaining fine particles without soaking the wood. Be sure to rinse and wring the mop frequently, and always clean in the direction of the grain. Proper cleaning ensures that your finish adheres evenly and lasts longer.