What did you do on or to your other bike part 2

[pdedse]

..., I might try those cheapies that Pdedse mentioned a few days ago.

I think they would produce enough heat and more for your "cold" riding.  The hottest setting of 3 temps helps at below 40 degrees, and it allows me to withstand the chilly temps longer.  But below 32 I don't ride much because the country roads are almost always wet in winter, and there's a chance of finding some ice.  After an hour or two at 35-40 degrees, my toes are what send me home.