Gave the relay contact a good dose of CRC and there was a very slight improvement in sticking, but the problem is still there. On a positive note the horn tone seems a little clearer/stronger. I guess a little dirt/oxidation was removed with the CRC.
I once heard somebody mention that if you gave a sharp tap on the relay housing that could help get rid of magnetism by realigning the electrons in the metal. Is that possible?
Chuck, thank you for the suggestion and confirming my magnetization suspicions.
bmoran4, thank you for your input as well and I also wondered if a degausser might work to demagnetize the relay.
