How to dilute 91% isopropyl alcohol to 70

Dilute 90 Isopropyl Alcohol to 70 [SECRET REVEALED]

Alcohol or bleach are both effective at disinfecting surfaces. However, did you know there is actually a counterintuitive rule of thumb you need to follow when cleaning with alcohol? This

The ultimate cleaning with isopropyl alcohol guide

The ultimate cleaning with isopropyl alcohol guide

Why is 70% the most effective concentration of isopropyl alcohol for cleaning and disinfection? This operable alcohol particularly in solutions between 60% and 90% alcohol and 10 to 40% purified