And, cleaning a garage floor filled with grease and grime can be so difficult that cleaning it the old way will only let you spend a lot of time cleaning while accomplishing very little. If you need to use degreasing chemicals, it is advisable that you use green chemicals. Green chemicals can really help clean off greasy or oily deposits stuck in your garage floor. This is why you need a pressure washer that ejects hot water or steam. The high temperatures will eventually soften the grease and let you wash it off any surface easily. Using cold water can work but only if you use high quality degreasing solutions, which are quite expensive and emits harmful fumes. However, if you need a pressure washer for heavy duty cleaning, then it is highly recommended that you get a hot water pressure washer. Hot water pressure washer will enable you clean a lot more efficiently and at a faster rate. There are so many advantages of hot water pressure washer over conventional cold water pressure washer. We all know that washing the car is a chore that most of us dread on doing. But, we need to do it. With a pressure washer, it will make washing the car a chore that you will look forward to rather than dread because of the fact that it s so easy to do. You can also wash a boat using the pressure washer. For electric models, you need to flip the switch on and off for a few seconds. After purging all the excess water from the pump, the next step is to disconnect and drain all the hoses. This will help the inside of the pressure hose to dry more quickly, which will prolong its life. After that, let the engine or motor of the pressure water cool down. The GPM or gallons per minute is another factor that you have to consider when buying a pressure washer. Normally, you will find that as the pressure increase the GPM will also increase. Basically, a higher GPM will mean that it will be able to cover more surface area in less time. 3 GPM will be able to clean 8 to 10 square feet of area per minute.