Whats Wrong with my Chit Potatoes

Keep them somewhere cool, and they'll be fine!  Do you have a shed that'll keep the frost off them?  Or a porch?

Finally someone confirmed what I said!   

It might be better to move them out of the direct sunshine - it can get very hot on a windowsill.  They still want to be somewhere light, though, so don't go sticking them in a cupboard!  Plus you can use the sill for seeds.