This really depends on the plate.
I don’t disagree that soap and water is the best cleaning method…
But I clean my textured PEI plate with 70% IPA between prints and only have to clean with soap and water every few months and have very little adhesion issues.
In fact I have bad adhesion issues when I clean with soap and water only and not follow it up with a swipe of IPA before printing.
When using the holographic pattern plates and PETG, I have to clean with soap and water everytime to get it to stick.