To remove chalk from the rubber holders take the holder with both hands using the your thumbs,index fingers and your middle fingers. Your thumbs should be on the rivets underneath on each side of the strap. Place your fingers on the top edge of the rubber holder by the chalk and then push the chalk up and out with your thumbs. Do not pull the sides away from the chalk for this will damage your rubber holder. To remove the chalk from a Chalk Tub take a flat head screw driver and using the open slot in the bottom of the Chalk Tub firmly push up on the chalk to release it from the Chalk Tub.