I tend to sweat quite a bit and I had a pair of headphones (not Presonus) where the ear cups starting chaffing and were ruined in a short period of time. I purchased a pair of Presonus HD9s and I'm concerned that the same could happen to them. What is the proper way to take care of them and prevent the sweat from ruining them before their time? Is it OK to use a silicone spray on the ear cups to protect them. Any sincere advice would be greatly appreciated!