Dbfiu,

I use a heated bed with auto leveling.
The slurry should not be thick. It should be basically colored acetone. I put a little on a paper towel and wipe it on the cooled bed leaving only a thin see-through amount. Just enough to remove the shine from the Kapton tape.
I also often wipe it on between prints when the bed is hot. Then you have to be fast about it because it will dry quickly and leave too much on the bed. If there is too much, you can remove some of it by rubbing the bed with a clean paper towel.

Chris