I have a 665 which has been great till recently. The issue seems to be no connection to the antenna for the XM side of the unit. The unit was in the rain some. I took the connection apart and it appears there is corrosion in the two parts of the connection. The XM will try to play once in a while. I enjoyed the XM and part of the reason for purchasing the unit. Is there a cleaner that could be used to help fix the issue ? The antenna and connection hardware are no longer available. Is there a newer unit being made with XM ? Thanks