How to clean my iron!

[neverlookback]

Went to iron school shirt tonight and the iron has put a big black mark on collar!
I've tried scrubbing but can't get it off!
Any tips on how to remove it?

Watching this thread eagerly as my iron looks like it is caked in coal!

www.amazon.co.uk/Faultless-Iron-Soleplate-Cleaner-Remover/dp/B003TO1AF8

This stuff works like magic.

Lakeland do one - lasts years and is fab

Thanks guys I'll order some