Hello Joakim,
I agree with all Kerstin says. Indeed it’s normal for the the harmonica super 64 chromatic wind savers to stick when wet. They are thin and plastic. In theory if you take your hot breath on glass you know it fogs up it’s the same moisture which makes the wind savers become wet and stick. I put mine in a towel covered with a heating pad for about 15 minutes medium temp before playing this helps prevent condensation. Some musicians like to carry more than one with them and some feel they have a dry mouth and bypass sticky wind savers. I like to set mine to dry out for an hour or two usually rotating both sides then I can heat it up again and play it for about an hour before drying out any sticking wind savers. Hope this helps you to have better understanding for lots of fun playing this wonderful instrument.