Our new house is 25 years old and has great Anderson windows and sliding doors throughout. Expensive according to our home inspector. But, I can tell a lot of them leak because the paint around the sill is cracked, and in the case of one window, cracked and pouring like a faucet during a storm ( i put caulk on an obvious gap by a plastic strip on the outside of that window, and now it is fine). But generally all the windows have at least a little bit of pain cracking at the sill, or a few have some slight water stains on the wall. This is a very well built house and I want to know if I should have some professional look at them all and do some maintenance or something. Thanks.