ste m
Use the sugar soap for the insides and for out side if you are doing trad i use a mixture of a few drops of washing up liquid and a few drops of cif floor cleaner,
Cif floor cleaner as it leaves no residue and leaves a brillant shine,
I use that solution to clean trad and is useful for when going over to wfp as i have said leaves no residue!
Try it for a day