im fortunate to have an ev so can defrost it from the comfort of my armchair, but yes there are various ways. the wingmirrors do still make a hideous noise unless you go out without key and spray them too.
i use Autoglym De-Icer for door switches and wingmirrors. its fairly good.
Current Car: Hyundai Kona Premium EV...2 way 40kg hoist
Last Car: Toyota C-HR Excel Hybrid...4 way 80kg hoist