does Dryer work?

looks like no matter how much i push Dryer/reduce moisture (D) buttons in menu - surface still reacts like if it is wet and with "Show wet area" mode "on" you can see squared "checkerboard" on areas which were wetted most

Sorry but this is how things work in Expresii. Drying a layer only stops it from flowing. You need to use another for laying dry strokes that don't wet-blend with what is already on the page.