Ironing malfunctions..
I tried using ironing on a test print on my MK3S and Prusa Mini +
It appears I have made an error. The MK3S is the black squares (0.6 nozzle). The Mini is the white squares (0.4 nozzle)
I used PrusaSlicer 2.3.0+ and defauly PLA profiles.
The MK3S ploughed the surface, the Mini produces a lattice effect. Any helpful advice welcome from folks who have been successful with ironing would be much appreciated.
A bit hard to see on white pic...u 
RE: Ironing malfunctions..
I am just starting to use PS myself and had some issues with ironing.. if you are over extruded to start it does not work as well .. to much to remove and you have to help it out with tweezers and spatula .. I found that with a .75 nozzle I changed the default ironing space from .1 to .3 and got less issues ..not as smooth but good enough .