Overall score includes:

Greasy soil removal (100%)

We use PVC sheet covered in a greasy soil (the PVC sheet holds the soil better than the ceramic tile we usually use). Following the manufacturer’s instructions on applying the cleaner, we used a mechanical arm to clean the sheet. The sheet's cleanliness is then checked with a spectrophotometer. The test is repeated 8 times and the results are averaged.

Where instructions stated, we applied the cleaner to the sheet and left it for the designated time before scrubbing. Not all cleaners had application directions. In those cases, we applied the cleaner to a damp sponge before placing the sponge on the sheet and scrubbing it clean.