Well you know what they say, The Longer(s) you leave it:
I've hard that barkeepers friend is good, or I would def go the route of Baking soda ( you can't really go wrong with that stuff )
I use it on the filter and just leave it in a in a bowl of ( fairy ) boiling water.
there's so many different brands out there saying how wonderful they are but there all just dog when it comes to grease so I'd just try one of the above methods.
That Robert Dyas is always good for these kind of probs.
Put up a big scaffold shelf in the living room with metal brackets. I've drilled a few mil off on one side so it isn't level. Problem is if I drilled a new hole it'd join the old hole and make one big hole. Reckon I can fill it with filler and drill a new hole or is filler not strong enough?