Have a ct'c printer that has problems with first layer.

Have a ct’c printer that has problems with first layer. I am quite a noob when it comes to my printer. I have levelled it and found that bed was warped so got glass plate and relevelled. Also put 3mm buffer to compensate but still will mot put first layer dow. Anyone else have a ct’c that they want to throw out the window?

well for me, aside of making sure I’ve levelled at least 9 points and made sure it’s roughly a paper’s sticky width, I use blue tape with a layer of dried PVA glue on the glass bed.

I’m using pla @ 190, bed @ 40