Generally, a finer nozzle will be more effective at spot-cleaning grease stains. For mold or mildew, use lower pressure and coat the surface in suds first. Gas or electric pressure washer?

The nozzle is compatible with both battery and gas-powered pressure washers, and can withstand forces of up to 3,300 PSI. If you're cleaning something ... of its valves and pipes need to be ...

As long as you use the correct nozzle tip, they’re also safe for washing cars. Electric pressure washers are also quieter than gas-engine pressure washers, and don't need much maintenance.

A pressure washer ... a concentrating nozzle. The resulting blast washes away accumulated grime on surfaces such as decks, driveways, and patios. It can also be used to clean other items ...