You will need to continue to inflate the small Pilates balls over time, so be sure to keep your straw(s) in a safe location. If you lose the straw, you can also use a small pump to inflate the ball, but be careful of over inflation.
To clean the ball, use a small amount of water on a lightly moistened cloth. Do not use the ball if it is wet or slippery. Never use corrosive cleaning products on the ball.