hand wash them or even use old toothbrush, if they are made of leather they will get hard so spot washing may have to be done, but after wash tumble dry for a few min and hang them up the rest to dry fully, may have to moisture them up with like a batting glove solution to keep them soft feel

Wash in cold water.Tumble on low(delicates).wet palms before game time so they can have grip(sticky).