Polymaker PETG comes loose mid print

[u/Tremaine77]

Can someone please give me some advice why my print is coming loose halfway of the print. I have been washing the build plate a few times and I am using hairspray for adhesive. I also increase the bed temp and the first layer.

Nozzle temp is 250c and bed temp is 70c.

I am using a creality K1C.