since i'm now backloading slin pin's to do test injections in delt i'm being more cautious about having my hands clean and i was wondering if after i wash my hands really well should i use a hand sanitizer? or are there chemicals in there so i shouldn't use it? also i'm wondering each time i wash my hands should i use a fresh towel after its been through the washing machine? since if i wash my hands real well and i already used this towel before to dry my hands and then use it again is there a chance that my hands might not be as clean anymore? so would hand sanitizer after drying hands help kill any bacteria or whatever?