This morning I had both derailleurs freeze up at 28F/-2C. I was able to at least shift down on the RD. Luckly I was on my trike, so to shift up I was able to reach back and move the derailleur with my hand after I shifted up on the shifter mechanism. About 2/3 into my commute, it started to shift by itself without me having to reach back there, but it was sluggish. Towards the end of the commute it completely un-froze. Unfortunately the FD was frozen solid the entire commute and I couldn't shift it up or down.
I spent all morning Tuesday lubing the cables and derailleurs with a no-name grease. It did rain pretty heavy most the day Wednesday, but I figured the grease should have prevented the rain from getting in the cables and freezing. Apparently the grease I used either was bad, I used to much, or didn't use enough.
I can kind of understand the FD freezing up completely, but what I don't get is why I could still kinda shift the RD.
What suggestions do you guys have (and please don't say to get a SS/FG because there are way too many hills around here)? Also what do you use to prevent your cables from freezing?