After a perfect raft the first layer messes up

[Scrapenbaker]

Try increasing the bed - extruder gap a little. It looks like the slightly thicker first layer is catching on the extruder. Half a turn might do it.

Do you need to print a raft? I find with Buildtak I never need to. It keeps the print attached and with no warping.

I increased the gap, but it still happens on some areas of the print.
lines2.jpglines1.jpg
I tried to take a picture. On some areas, some "strings" of the first layers lift from the raft just before the nozzle moves to the same spot. Than the nozzle hits the "strings" and burns them. But I can't see why this happens. The areas next to them are fine again…

Without raft I can't even print the first layer. I don't have a Buildtak, I use "ABS Juice".
Thanks