We have an exercise room that also does double duty as a guest room on the rare occasions when people visit us. The exercise bike and other equipment get carted out and stored in the garage on those occasions, but the very heavy weight machine has to stay in the room. It's just too heavy to move. It happens to sit on a rubber mat, that quite frankly smells very strongly of rubber. It has to stay there -- it's protecting the wood floor underneath.

Can anyone think of anything that I can clean it with to make it not smell so strongly? Or something I can put in the room to mask the smell somewhat?

Makes me feel bad for the people that stay in there. Once you're in the room for a minute or two, you no longer notice it, but when you first walk in, it's quite noticeable.