Hang in there. Spring is coming.
My rubber hammer is getting a lot of use this year. It lives in the van, under my seat, and gets used to give the rear brake drums a quick knock if I haven't driven it for a few days. After a little while sitting idly on the drive during damp weather with the handbrake on, the drums can seize up quite easily. Sometimes they will free themselves when I drive off but, from time to time, a little extra help from the hammer is what they need.