Good question. I generally use older Lowa screws for base anchor as they are a wider diameter/bore than the Black Diamond or Grivel screws we sell.
So they tend to clear more easily in general and we flag our base screws so they don't get lost in drifting snow or hit by snowmobiles etc. The flag
pole (6mm thick fiber glass) tends to offer some movement in the wind and keeps things from locking up too bad. The flags also serve as a wind
indicator visible about a mile out.
If things are really frozen. I'll pull the screw and hold it in my bare hand for about 25-35 seconds. The heat conducted to the screw usually melts
the inside just enough the you can swing the screw with your hand and the ice cylinder will slide out.
I've experimented with Triflo sprayed into the screw to help avoid freezing. Works the first time but needs to be reapplied each use. Not really any
better than good ol body heat and conduction.
With allow screws like the one in the beginning of this thread, hand heat works great. The problem with alloy is they dull quickly. Both the tips and
the threads. Especially if you set them near a beach. Even when you can't see it, there is often sand silica in/on the ice. Dulls screws and ski
edges fast.
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