I've combined wfp with a dip of washing up liquid for very dirty cleans (upstairs)
and down I've used a hand brush and washed with a spray washing up liquid solution!
It works a treat, for getting rid of grease/black dirty grease... and a thorough rinse of course!
Now there will be a large debate on the subject, if this is read... and I will be told to crawl back under the stone... :

My point is that a carpenter doesn't just take a saw to work... he takes a huge bag of tools!

Oh, and residue, my Ar........tichoke
