One solution is moving clothes you are drying on a line in the basement to outside.You should also check plumbing pipes to make sure nothing is leaking.
Water seeping into the basement may mean the wall is saturated. Call in a qualified expert to assess the problem before slapping on a sealant from the local d.i.y.
Fixing your leaky basement requires some professional advice. Look in your local yellow pages for basement and foundation repair places. Most should come give you a free estimate.