A clean patio can make a huge difference to the appeal of a garden but it usually involves a great deal of physical work if you want your tiles to show up nice and clean.
Taking a wet rough sided sponge to the tiles can take a great deal of time but it means you get a closer look at the dirt, and you may find some areas need a lot more elbow grease than others. Simple household products such as sponges, washing up liquid and warm water is often used, but you should always thoroughly sweep the tiles first.
Pressure washers can save you a good amount of time, but they’re quite costly, even to rent, and you only need to use this alternative if the area is too big, because simple (physical labour) scrubbing techniques do work.