This is us (Cleaner and Clearer Ltd) cleaning above some kitchen wall units for a End of Tenancy Clean in Cambridge over the bank holiday.
The kitchen unit was thick with grease and had probably never been cleaned before. To do this with chemicals alone would be impossible. We opted to use an oven cleaning blade (45 degree angle) making sure not to scratch the surface.
Using this technique saves us a ton of time and allows us to get the job done quicker. For a tenant to clean the very same kitchen unit would take them several hours to achieve a nice smooth, clean finish.