Pressure Washer 101Every successful pressure washing project starts with selecting the equipment to meet your home’s specific needs. Always use ground fault circuit interrupter protection (GFCI) for electric pressure washers and never operate any pressure washer in wet conditions or during storms. The most expensive mistakes in pressure washing typically involve using too much pressure or getting too close to the surface. Avoid pressure washing in direct sunlight when possible as rapid drying can cause the soap residue to streak. Yes, pressure washing can significantly boost your home’s value and appeal in several ways.