Hmm... For some reason I have had a perfect wireless connection over the last 2 days since smashing my Mighty Mouse. I think there may be a connection between the MBP wireless drops and bluetooth interference. Just an observation.
The way to clean it - rub it over the black microfibre cloth that comes with a mac. Much better results than using paper - that way I have to clean only once a month, which is not a big deal at all. Someone wrote "how can you pay 3000$ for a computer and have your mouse get stuck" - I'd say, how can you pay 3000 $ and not take basic care of it and clean it regularly???