Best time to use hand sanitizer and should you make it at home?

https://www.aarp.org/health/conditions-treatments/info-2020/hand-sanitizer.html?cmp=EMC-DSO-NLC-WBLTR—NMCTRL-061920-F1-4656293&ET_CID=4656293&ET_RID=47185567&encparam=O0tn%2bqRKZEYTh4jMasBYrm5hB%2bgPgWvppzg6eGk0%2f2s%3d