You may want to first try manually cleaning off the nozzle. It’s likely there is material on the nozzle and that’s making the printer think the bed is lower than it actually is.
We recommend using a non conductive scotch brite pad as anything metal that comes in contact with the nozzle risks sending a static shock to the board.
If your first layer is still too high you can adjust the z-offset for you printer. The z-offset is the distance from the top of the leveling washer to the top of the PEI print surface and affects how tall your first layer is.
This can be done through the LCD menu by clicking the LCD knob in once to bring up the main menu then navigating to:
Configuration --> Advanced Settings --> Z-Offset
You can make your first layer less squished by turning the knob clockwise.
Once you have found a good setting for the z-offset, make sure to back up a screen and Store Settings.
The typical z-offset is a number somewhere close to -1.35mm. If you change the z-offset from -1.35 mm to -1.45mm this will make your first layer more squished. If you change the z-offset from -1.35 to -1.25 this will make your first layer less squished.
You can also adjust the Z offset live while the printer is printing. I like to do this while it’s printing the skirt. You can do that by selecting Tune --> Z offset while printing.