Tools like scissors and knives are often used when propagating and caring Haworthias. It is important to sterilize the tools to prevent pathogen infections. An isopropyl alcohol solution (often branded as rubbing alcohol) is not very effective at killing pathogens that infect plants. A simple method is to use high temperature, like dipping a tool in boiling water or placing it in the flame of a lighter. A more thorough method is to soak the tool in a ~0.01% benzalkonium chloride solution (often branded as disinfectant cleaners) for ~2 minutes.