Borrow Glass scorer / cutter

To use a glass cutter like the one, follow these steps for scoring and breaking glass safely and effectively:

1. Prepare the Glass and Cutter: 

Ensure the glass surface is clean and free of debris.

If using a traditional oil-filled cutter, ensure it's adequately lubricated with cutting oil or a suitable alternative like kerosene or sewing machine oil.

2. Position the Cutter: 

Hold the glass cutter firmly between your first and second fingers, with your thumb on the opposite side of the barrel for control.

Align the cutting wheel precisely with your intended score line on the glass.

3. Score the Glass:

Apply even, consistent pressure as you pull the cutter across the glass in a single, continuous motion. 

You should hear a distinct, coarse scratching sound, similar to an ice skater on ice, indicating a proper score. Avoid excessive pressure, which can lead to "white slivers" along the score line. 

Lift the cutter off the glass once you reach the end of your intended cut. 

4. Break the Glass:

For straight cuts, place the scored line over a straight edge or a support that allows the glass to break cleanly along the score. 

Apply gentle, even pressure on either side of the score line to encourage the break. 

For more controlled breaking or to separate sections, you can use the notches near the head of the cutter or running pliers to "run" or "open" the split.