Check the receiver box for water inside it. If there is any, dry it out and your receiver completely. Perhaps sit the receiver in front of a fan. Sometimes the waterproof gasket comes screwed up from the factory.

If you haven't yet destroyed your ESC, you can send it in for repair or replacement. If your ESC is under 30 days old it should be free. http://www.traxxas.com/support/kb_se...&highlight=354 If it's older than 30 days the fee is $20 to $45 depending on the condition. http://www.traxxas.com/support/kb_se...&highlight=361