I purchased the screen saver by Best Skins Ever for my sons new Ipod touch 4 and went about installing it the same way I had installed Zaggs on the iPhone. Well everything looked good the night I installed it but the next morning when my son turned it on their were a bunch of small grey spots all under the screen and the light behind the screen had a weird glow. I'm sure it was caused by the excess moisture seeping in through the seems of the device. Now I don't know if the spots my have eventually went away but it looked so bad I just couldn't feel good about waiting to see. I immediately scheduled an appointment with Apple and made sure to take the skin off before turning it over for their review. Luckily the genius at the Apple store had now idea what may have caused the problem and quickly exchanged it for a new one. I don't think I did any thing wrong except for not realizing this new iPt4 is not constructed nearly as well as a iPhone or the previous iPt's. You can not use nearly as much liquid and you better be very quick absorbing the excess when you are pressing it out during the installation process. It's a awesome device and a good step up from the previous generation but please use caution if you are trying to do a wet install of any type. It seems that if they are prone to light leaking out then surely moisture can easily leak in to these devices.