Rubbing Alcohol Kills Fleas. Alcohol, also known as isopropyl alcohol is a powerful disinfectant, that’s why many pet owners rely on it to kill fleas. Rubbing alcohol is what kills fleas on contact.

Experts recommend dropping fleas or ticks into a glass or jar filled with rubbing alcohol. However, we’ll also need to ask if it’s safe to use around your home and on your pets. Start by mixing equal parts rubbing alcohol and water in a spray bottle, then add several drops of dish soap, and shake well so that all is mixed thoroughly, says verminkill.