To test removing it, try lifting the corner of a piece with a putty knife.
Use the same putty knife employed earlier, or one with a thinner blade.
Allow the filler to set for about 10 minutes then use a putty knife to smooth and level it with the surface.
Afterward, smooth and trim the compound with a putty knife.
On stubborn tiles use a wide putty knife and a hammer to get things started.
In shape they are similar to an ice scraper or a putty knife.
If not, you can spread them apart with a wide putty knife.
If they are, scrape them clean with a putty knife.
Remove thick oil and dirt by scraping with a putty knife.
She doesn't hear the scratch of your putty knife as you pry open the screen.