we have had good experience cleaning our mouse fur walls with grocery store grade, foaming, Woolite rug cleaner. and yes, there is one small streak that we've never gotten out, no matter what we've tried. but, it's hidden behind a drape!
"Oxy Clean" is primarily comprised of a DuPont product called Oxone. it is also commonly known as potasssium monopersulfate, or, potassium peroxymonosulfate, or simply, MPS.
you can often find it in bulk (one pound, three pound, five pound, etc.) at a favorable price at a good spa or pool supplier. here in the northeast, for example, we used to buy it at Namco Pools in 5# plastic containers of their product called "Saf-T-Shock."
ymmv.