Originally Posted by HillRider

If your ultrasonic cleaner used a water based cleaner then the second posting (Western flyer's) comment may have hit it, you didn't get the water out of the chain. Try wiping the chain as dry externally as possible and heat it with a hair dryer, etc. until it is too hot to touch. Keep it hot for a while to insure all the water is gone and then relube and see if that does it.

BTW, Chain-L is a very good lube and did quite nicely in a major lube comparison test in the most recent issue of Velo (aka VeloNews) magazine.