While I never had trouble in California, I've been having issues pushing the prowler around outside in my new, more central, location.
* My body warms up to the sub-zero (Fahrenheit) weather after about 20 seconds of pushing (and this lasts through multi-minute rest periods, standing around in my shorts). But my hands still need to be kept warm somehow. Gloves work, but they are slippery while pushing.
* I haven't figured out any way to keep by beard from freezing.
* Prowlers are less good on the ice than you might expect. When you hit an ice patch, you slow down to keep from falling, but the prowler likes to speed up. This is, of course, bad. If you hold on tight, the prowler makes it past the ice patch and stops. You are now the one on the ice trying to get the prowler moving again, while the prowler is planted on firm ground.
* Hills are best avoided entirely. Google for "Sisyphus".
* Finally, there is something about gasping for breath in icy air that just defeats you on long pushes.
Not sure what to do, except maybe take off one of the plates and add a bag of road salt.