Hi Guys - I know this can be considered a broad topic. But I wanted to create a thread where we can collect what you all do to get the most perfect print possible when it comes to the bottom first layers and bed adhesion.
Of course, this will depend on the print as not all bottom first layers need to be perfect, depending on the part
I noticed with Black PETG and a textured bed, that is absolutely necessary (in my case) to use a very thin layer of glue.
If not, the bottom layer will stick too much and even though the bed is cool, you’ll still can get uneven stress marks when the print is removed from the plate, therefore leaving these unsightly white marks on the bottom surface.
(I am using mostly default filament profile settings so any advice on different bed and filament temps that could address this would also be helpful)
Now, depending on your post process processing this might not be a big deal.
This is where a heat gun will come in handy. Basically just heating up the areas in an even pattern until the white disappears and the texture looks uniform.
But, I’ve had success with just using a thin layer of glue and after cooling the, print slides right off with no problems.
However, the question always arises how much glue and when do you reapply because too much glue can also cause problems
my process: after ensuring that you have a very clean bed either using detergent if necessary, hot water, etc. I wipe the bed with isopropyl alcohol, then drag a purple glue stick in his zigzag pattern being careful not to press too hard to leave any globs. Then with the paper towel soaked with a light dose of isopropyl alcohol, I drag the towel in a uniform pattern evenly spreading the glue.
You should not see any film or residue on the bed.
This has worked for me many times however the question arises is when do you reapply - and depending on your process or how busy you are you’ll probably forget to reapply and then notice the print not sliding off again and that’ll be your cue to reapply, but now you have to deal with the white marks again. 
I do not have this problem with PLA, it does not stick like PETG.
So I ask you to provide any other hints tips, tricks etc. on getting that perfect first layer. i would love to hear it. This includes using any other types of filaments - as I’m start to broaden my range of different filament types.
Thank you
