- 1). Knock out any sharp, broken edges of glass in your window with a hammer. Do this with care so you don't cut yourself.
- 2). Take a paint scraper, putty knife, or chisel to scrape the old putty from the edges of the window sash.
- 3). Apply paint thinner or bleach to the putty to soften it if you have trouble removing it. Cover the area with plastic wrap and when the putty feels soft underneath remove it.
- 4). Work the putty loose with the chisel, paint scraper or putty knife. Take care not to gouge the wood sash.
- 5). Loosen the broken glass by pushing into the joint with a putty knife or chisel. Wiggle the chisel or putty knife while you apply pressure into the joint every 6 or 8 inches around the perimeter of the sash and glass. Then remove the broken glass.
- 6). Remove the remaining putty after the glass is out of the sash, until you have exposed the wood on the sash. If there is still any remaining putty residue, sand the wood with medium-grit sandpaper.
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