With SWMBO away, in a plastic bag and in the fridge, close to your ice cubes for a few hours. Kills all bacteria. A wash helps but not necessary. It works!!!
Rgds
George
Just don't wear any - they are for wimps. WHat's wrong with a tatty pair of deck shoes with torn stitching, broken laces and spots of antifoul, beer and other liquids splashed over them?