I have had endless crap with the flexplate on my S7. I was told the cleaning is critical, well I've cleaned the plate dozens of times with .with 99.9% Isopropyl Alchol but to no great effect. Over the last month I have more scarp than I've done over the last 3 years using S3 and S5 printers with glass build plates. So I've resorted to using S5 glass build plate with great success.