Geeetech

I think someone will use the hair glue.
This is my point:
I won't suggest others use this tool on 3dprinter.
It is no safe(You can google it then you will find the news of someone use the hair glue but get big trouble)
This is my suggestion:
You can use the solid glue to replace it.It is safe and you can get a good result like the hair glue

Hi William,

I agree. There are a lot of reasons for keeping aerosol sprays away from heated sources. So we, too, only use solid glues, like Elmers Washable School Glue (Purple Glue stick). It's a tried and proven method for helping things stick on all sorts of bed materials.

While the deviation from point to point on the glass bed is very slight, it seems it still causes issues without glue. That is because, at least on my printer, the center is the highest point.

Another thing that seems to help is to use the 3D Touch and G29 at the beginning of every print.

I had some black PLA filament that would not stick. After I turned the heat up to 220c then it started to stick to the bed. And of course make sure the bed is probably leveled.