This morning I filled up, key went in grand (to the fuel cap) but took an age to get out.
Was forcing it a bit, eventually it came out and noticed ice around the key and lock. Never happened to me before.

When I went to pay the till girl told me it happened to another biker a few mins ago, he got some hot water from the coffee machine and tricked it down (good tip/bad tip) Would the water stay and freeze again?
Anyway just thought I’d share. See what others do? I’ll keep a small can of WD40 in the back box but say if you didn’t have that, any alternative hacks out there?