I have an HTC one mini, and it accidentally fell into the toilet earlier today. I immediately took it out and dried/sterilised it. Everything worked fine, except later on I noticed that both the front and back camera lens are fogged up. I googled it and saw that blow drying it is an option, so I did that and it worked, only to fog back up several seconds later. The phone back can't be removed so i'm not able to touch the actual lens, how do I fix this?