Question: "I think i have a leaky screen, can I claim on the insurance?"
Answer: You could certainly try. If you have windscreen cover as part of your insurance policy, and you had an incorrectly fitted windscreen through them, then they should certainly be informed. The key is to tell them you want your car dried properly. There is a tendency for some companies to send around a mobile guy to shampoo the carpets and that's about it. This will not dry the car out, but I don't think a lot of the people who deal with these matters at insurance companies are aware of that.