Originally Posted by joecaption
For one thing you've used way to much caulking.
New calking will not stay stuck to old so every bit of it's got to come off.
If those are vinyl replacement windows then there was no need for caulking, the seams are ultrasonic welded in the outside corners on the outside of the windows so all your seeing is a seam on the inside were the two pieces come together. By apply caulking you have sealed up the channel where water runs out of the tracks allowing water to build up in the tracks along with all the dirt.
If you insist on caulking it any way clean it all off and use 100% silicone and this time only put a tiny amount, just enought to fill the tiny seam. It does no good to have it blobed all over the vinyl where it's flat.
Thanks. They aren't vinyl replacements, I believe they are aluminum. They're whatever was cheapest for the builder to install in 2002 in Florida when the house was built. We're the 2nd owner, so I don't know for sure. To get the caulk to stay in place I was having to put my finger in there to press it down and into the seam, which was not easy in that tiny space. It wasn't staying in place otherwise. Is there any particular brand of 100% silicone caulk that works better than another? Since that area is so small, I can't get the tip of the caulk in there to follow the small slit all the way around, so I'm thinking I'll use a very small hard tip brush and see if that works out better, removing all the old stuff first. Thanks again.