DO NOT USE WINDEX WITH AMMONIA......You said in your post that you have monokote.....ever hear of the wet method of applying monokote on monokote? You spray the area that you want the design on, with windex.....the windex allows you to move the design around. Once the design is in place squeege out the windex and let dry..go over with an iron......the point is that the windex with ammonia activates the glue..and design is stuck down...not like with heat put pretty good....if windex with ammonia activates the glue.....it will surely loosen the glue when it is stuck down...how many airplanes have you seen where the trim is loose?....Used to happen to me as well...not since I switched to alcohol.....and its cheap too...Good Luck