In the last few years we get rain leaking inside our wood framed Lindal window. We thoroughly caulked this fall and thought the problem solved. We now found that water is getting in and is in the space between the window and the cedar sill. If I blow into the space with a hairdryer, a lot of water is forced out. I cannot find where it is coming from. I looked carefully at the caulking from inside and cannot see water getting in through the caulked area. How can I find the leak and fix it?