Under your workdesk
In the restroom
In your car
Pretty much anywhere there's privacy
1. Grab some Mouthwash*
2. Fill a medium, shallow pan/tub/container (anything that will fit your feet will do) with enough Mouthwash to cover at least halfway up your foot.
3. Soak for 10 minutes
4. Towel Dry.
*If you have cuts or open wounds, I'd suggest Epsom salts and warm water til you heal.
Give it a try. I think you'll like the results!