Originally Posted by: CRJARRATT

Guitar is constantly slipping away from me towards my knee. I'm setting streight in the chair with feet flat on floor I also have a foot lift which is place my foot on flat but that also slips and puts more twist on the wrist.

any suggestions?

I've seen people use a pad like this made for that purpose.

https://www.stringsbymail.com/oasis-guitar-support-cushion-oh-28-large-15642.html?catargetid=120229430000045032

I've also seen people use smaller non-slip pads like these.

https://www.stringsbymail.com/oasis-grip-strip-guitar-slip-prevention-oh-22-7323.html?catargetid=120229430000045032

If you search the web for guitar non-slip pads there are a bunch of options available. I've seen people even suggest one of those little non-slip pads for car dashboards to help keep your cellphone & wallet in place. I bet you even use a bit of that foam shelf liner!

Hope that helps!