Vynil decals CAN be applied using soap and water. Many installers use this technique to slide and adjust positions because the vying will distort if you try to pull it off dry while adjusting. The clear backing stickers are a different matter though. Your frame has to be really clean, the solution you use has to be squeegee'd out diligently so it doesn't leave "dry bubbles" that will show through. Normally after you install vynil using soap and water you just let dry and just get any air bubbles outs it does. The clear you may have to use a blow dryer set on low and kept a fair distance away to help it along. I would experiment with the solution and a couple spare stickers to get everything just right.