I have no crease and I haven't done the chop in ages.
Let it fold correctly by slowly lowering it ,
DON'T TOUCH IT.
THen let it sit with the top down for a few hours.
Cover the interior with a sheet (awat from bad UV rays)
later on, Raise it and then lower it again without touching.
See if it works.
Some times it helps to leave the top partially open at the point wher the window
has folded correctly for a while too.
After time it will just remember where to fold.
Some people just give up too soon and go for the chop.
Use Plexus and Renovo
