Multi-Purpose Disinfectant Excellent cleaning solution. Disinfectants with high alcohol content (45% to 55% or more) make cleaning more difficult because alcohol tends to fix soils to surfaces. Opti-Cide3 has just the right amount of alcohol (21%) to help kill microbes and not inhibit cleaning. Surfaces must be cleaned before they can be disinfected. So, use one Opti-Cide3 wipe to clean before using a second to disinfect, or just clean using one side, then flip the wipe over to disinfect.