Rat claw problems - please help!?

In the cold weather you can wear more clothes which will help a bit. Apart from that tree branches in their cage may help. Try and locate a shelf in it with branches leading up. They appreciate this set up and will spend time climbing and chewing the branches. Lemon trees are the best and a few branches can be spared regularly as it helps to slow down the lemon production. They love the leaves--nice smell too and the blossom. Will chew the bark off in places. You could also file the nails as well as clipping them. You need to wrap rattie up in a tea towel with the head and feet free. Vets do this to give them medication so it is sometimes necessary. Just do a few claws occasionally not all at once. Make it a game with rewards possibly just start off with a tie up and let you go and develop from there.Good luck but do have fun with your pets and talk to them while clipping advise them it is a necessary evil.