Hi Sammy, welcome to the posting side of the forum. I've not seen much about mildew on the forum so don't believe it's a wide spread problem. However, mildew, as you probably know, is associated with moisture. That moisture problem may be a leaking problem or may be due to high humidity. If your rig is in storage for prolonged periods of time in a high humidity area, you may want to buy some of the large containers of desiccant and place them in your rig while stored. If it's from a leak then you will continue to have a problem until the leak is sealed. Good luck with your problem.