so your French pane glass is a mess and you really don't know how to clean them. Here is a tip for you. Go to your local auto parts store and look at the car cleaning supply aisle. Look for their chamois. Usually they are made of synthetic fibers that will wick water away. What you can do is take those chamois and wash the glass with them. Put some dawn in some warm water, put your chamois in the solution and wring it out. They, wash the glass. Use a towel, one that doesn't have any lint on it and wipe off the glass and there you go. It will make your glass look great and it isn't much of a hassle.