I have a few sweaters that say wash by hand and dry flat. One of them is the Halogen boyfriend cardi. I don't mind the wash by hand too much, but they are soo wet afterwards that it takes forever for them to dry. Is it really necessary to wash them by hand or will a gentle wash cycle and spin in washer be ok? I wouldn't put them in the dryer, but I hate for them to be so dripping wet.