Use Hibiclens cleanser as a bodywash. It works very well at killing S. aureus on the skin.

Hibiclens Hand Pump, 32 Ounce https://www.amazon.com/dp/B000WN58ZM?ref=ppx_pop_mob_ap_share

Hibiclens – Antimicrobial and... https://www.amazon.com/dp/B00EV1D79A?ref=ppx_pop_mob_ap_share

https://www.amazon.com/Hibiclens-Antimicrobial-Antiseptic-Cleanser-Cleansing/dp/B00EV1D79A

this is what I use with a smaller foaming lid bottle. Works wonders.

https://www.amazon.com/Hibiclens-Antiseptic-Antimicrobial-Liquid-Fluid/dp/B00EV1D79A

That would be awesome to see pictures of the microscope results. It can be done with a cell phone. Although it's important to keep in mind that the microscope can only tell you if they are cocci cells and not if it's specifically S. aureus.