For me, by the time I found out about it, it was too late for
my hands, but I do find it helps other joints for
me. It can be a little pricey, but a lot of pharmacies have a "buy one get one" sale. Also, Costco carries it at a better price.
The ThermaCare hand wraps help me a lot! Cold makes mine much worse (I hate winter and air conditioning!)
There are OTC creams you can rub in. I never found them to be much help. But I do have prescription creams that help a lot.