Can speaker play be restored?

My phone took a very brief dunk resulting in no music play through the speaker. Seems to be a common problem. Everything else works. Phone rings, plays through earphones, plays through dock connector (but thinks it's always connected - even when it's not). I've tried cleaning the contacts with cleaner (hexane), and used a very fine wire to remove all 'dust bunnies' from the dock, did factory reset (all to no avail). Is it realistic to think that I can fix the thing? If so, how?