![Concrete patio slabs still look like this after thoroughly power washing. Would a liquid patio cleaner help, or do I just need a more powerful power washer? (mine is only 1800w/135bar) : Concrete patio slabs still look like this after thoroughly power washing. Would a liquid patio cleaner help, or do I just need a more powerful power washer? (mine is only 1800w/135bar) :](https://i.redd.it/ucjfms5i3pr81.jpg)
Concrete patio slabs still look like this after thoroughly power washing. Would a liquid patio cleaner help, or do I just need a more powerful power washer? (mine is only 1800w/135bar) :
![Dry laying slabs on Gravel or Sand: Laying instruction - Kronos Ceramiche - Floor coverings in porcelain stoneware. Dry laying slabs on Gravel or Sand: Laying instruction - Kronos Ceramiche - Floor coverings in porcelain stoneware.](https://kronosceramiche.com/src/uploads/sites/3/2021/04/dry-laying-outdoor-tiles.jpg)
Dry laying slabs on Gravel or Sand: Laying instruction - Kronos Ceramiche - Floor coverings in porcelain stoneware.
![Concrete patio slabs still look like this after thoroughly power washing. Would a liquid patio cleaner help, or do I just need a more powerful power washer? (mine is only 1800w/135bar) : Concrete patio slabs still look like this after thoroughly power washing. Would a liquid patio cleaner help, or do I just need a more powerful power washer? (mine is only 1800w/135bar) :](https://i.redd.it/x9zrg6qj3pr81.jpg)