geeetech A20T : bed adherence issue

[elise91]

Dear all,


I face difficulties with bed adherence during printing.
Material is PETG, nozzle temperature 240°, bed temperature 60°.
I tried from 215 to 245° nozzle temperature and from 50 to 65° bed temperature.
I wash bed before each print with alcohol.
I prepare printing with adherence in Cura.
Any solution.... everytime, part can not glue to bed and is finally destroyed.

Do you have any advice for me?
Thank you in advance.
Best regards