I never had any problem with water in cameras I have 5 wildgame cameras two moulrie's and one simmons I had the wild game for about 4 years and other 3 for about a year. I heard the seal dries out and cracks I havent had the problem.
Take them down. Only time water ever got in mine was a few years ago when I left them all winter. If snow and ice lays on them for days and weeks at a time it will find its way in. You can also take electrical tape and go around the opening.