I'm not sure what smell you mean. The only one of my fleshlights that has any kind of discernible odour is my first one, that I stupidly damaged with a soap-type cleaning agent. The rubber is decaying. I've just ordered a replacement and I am simply going to discard it.
If you have some sort of other smell, I can only suggest cleaning it more thoroughly. There's also fleshwash. I give all of mine a spray with it every once in a while. But these sort of cleaning tips and such are in the FAQs, should be readily available info.