polypro filment sticking problems

fairly new to this. printing a 6inx6 in x.5in ring . having trouble with getting it to stick to the bed. tried pp sheet protector taped down. hair spray.  found nozzle temp down to 190. higher temp has drooling problem . am considering taping a 15 mil pe sheet to see if iit helps. also will try increase brim , maybe raft the whole thing up a layer or two. anyone have experience on larger pp parts ?
thanks