For substances like grease, oil, and wax that are especially difficult to remove, hot water high pressure washers provide additional cleaning strength. With hot water, the breakdown and dissolving of these persistent contaminants occurs much more than cold water. These types of washers are often used in industrial settings, automotive repair shops, and commercial kitchens that require heavy-duty cleaning. They have built-in heating elements that rapidly heat the water to the preferred temperature. High pressure hot water washers often allow the user to change the temperature and pressure settings for different cleaning tasks. Even though there are benefits to these washers, they can be more costly to operate than cold water units due to the heating system required. Additionally, they may require more upkeep.