Use this pre-programmed test to find out the best ironing flow and speed for your filament. First panel is 30 speed and ironing flow from 0% to 60% at increments of 10. Second panel is 35 speed and Third is 40 speed. Try the top panel first and delete the bottom two and if you don't find a smooth surface then try the middle panel and delete the top and bottom panels etc.
Save time and aggravation to find that smooth top surface.