Sprayway does well too. The trick is to spray it on and wait a few minutes to let it break down the glue a bit. It'll drip/run and be a little bit of a mess, but nothing that isn't manageable or won't clean up. When you run the razor blade across the window, the window cleaner will pile up and drip, so be prepared for that with a towel. If you're working in a shop, you can just flick the razor blade down toward the ground and it'll come off, otherwise, it's a paper towel to the rescue. Make sure that you get down in past the interior belt molding piece on the door because some of the glue can hide in there and roll up with the window later.