Redbrickman
Printer Master
I don't use Simplify3D software but I have to say their print troubleshooting guide is the best I have seen after trawling a lot of sites and You Tube videos etc.
Hope you find it a good reference document...
https://www.simplify3d.com/support/print-quality-troubleshooting/#print-not-sticking-to-the-bed
Hope you find it a good reference document...
https://www.simplify3d.com/support/print-quality-troubleshooting/#print-not-sticking-to-the-bed