A pocket size Thermonuclear reactor to power a 2500 watt heating element. The radiation will kill any bacteria.




















Is the locker vented (gym style with open grate face)?

Battery powered fan to keep the ail moving might do the trick. Use rechargeable batteries and charge them nightly.

http://www.target.com/Touch-Fan-Meta...battery&page=1

RV places sell some that really last a long time to move air around in RV evaporation style reefers.