I have owned my A1 for a few months and god damn love it.
My 1st layers have been incredible, but I made them that little better, may not for you but for me it did.
Before every print the nozzle is ran through a clean nozzle process and is rubbed into the build plate, over time this slighty wears down the nozzle (not by much, don’t worry).
I just re ran the bed level calibration and it seems to have taken into account the wear down of the nozzle giving a first layer like the day I bought it fresh 