I think you've made the right move. It's unfortunate when something doesn't perform or withstand the process of a light cleaning. If you're not 100% happy from the beginning, then it's good to get things checked out. Plus, it's not like one can go across the street and buy the same product from another vendor due to the uniqueness of the amp itself. Hopefully, you'll get it back soon and begin to enjoy the full potential once again.
Thanks WJE, I haven't even heard its full potential yet, so I can't wait to get it back and enjoy it, thanks again.