i want to make sure the inside of shoes are clean? what can i use?
Spray the inside with Lysol a couple of times. Or find out what the local bowling alley uses.
Soak them in baby bottle saniftizer maybe ? My personal favourite though is a dremel with a buffing wheel attachment and some shoe polish
I would use a FLAME-THROWER. used shoes are no bargain. many people have foot funguses and toenail funguses etc that you DONT want to get. Trust me on this. Torch those shoes and buy NEW.
If you have one, open the shoes up and bathe the inside with a strong UV light for a day or two. If you don't have a UV light, expose them to bright sunlight for a few days. Afterwards, dust the insides with a good fungicidal/antibacterial foot powder.