Yea i applied oil. I took out the protector and realign it myself. Then i use the sticker to remove some of the dust because i reuse the protector. Then only left very thin layer of air gap on the two sides which was fixed with a cotton bud soaked in vegetable oil. Now looking great after wiping it with alcohol.
The trick is to align the protector lower such that the front camera is closer to the top part of the camera hole on the protector. This will remove the air gap for top and bottom. then just align the protector in the middle to minimize the air gap on left and right side. then let the oil do the rest. So still workable but need to align nicely cuz the edges are slightly curved which explains why many protector for p8p have black border. Hope it helps those who bought Tersely SP.