Washing your Tossaball® Hybrid juggle balls is a good idea. Initial washings even when brand new is recommended, especially for the firmer models which are the Hybrid 2.8, 2.55 and both polyurethane models. Initial washing before play will smooth out the rough edges of a newly manufactured hybrid juggle ball. Sometimes with lighter colored juggle balls like yellow and white the beeswax from the nylon sewing thread leaves trace amounts of wax which can be washed off. The soft models should be washed whenever dirty. Remember to wash in cold water washing white suede balls separate. Air dry your juggle balls overnight to avoid possible heat damage from a hot dryer. A hot dryer may harm the polyurethane balls as some shrinkage may occur.