I wash mine in hot soapy water (but I don't soak to extend to life of them), rinse, shake off excess water and thoroughly spray with methylated spirit and allow to dry.
METHYLATED SPIRIT AS A DISINFECTANT
This compound can be used to disinfect medical instruments, hands and skin before small surgical interventions, including removing a splinter or draining a blister. It can also be used to disinfect the skin before injections.