Work instructions for emergency glass introduction

I found an answer online, and I don't know if it will help you.

The size measured on the glass is 2mm smaller than the actual size. For example, when cutting glass with a width of 600 mm, you only need to measure 598mm on the ruler, and the glass width cut by the glass cutter along the edge of the ruler is 600 mm. When cutting glass, make sure that the glass surface is dry and there is no water. Measure and coat with kerosene. The angle is between 60 degrees and 80 degrees. Put glass cutter on the line between you and the printing press. The most important thing is to calm down and not be afraid. Hold the ruler in the left hand and glass cutter in the right hand, so that the outer wall of the cutter bar is close to one end of the ruler, and then start cutting. Glass cutter moves along the edge of the ruler to cut, and don't stop halfway when cutting. The intensity should be even and steady, and it will not work if the intensity is too small. After cutting, cut the glass hard. If the remaining narrow strip is not broken, you can pull it off with pliers. As for the way of collecting power, there is no need to collect it specially. Usually you draw to the end along the ruler and then stop. Cutting glass is manual, relying on experience, and it is not clear in a few words. The so-called practice makes perfect, mainly practice more. It is recommended to keep practicing with useless glass whenever you have time, and it is best to find a master to guide you face to face. After all, you can't say it clearly.

Also ask you: usually the glass is cut along the edge of the ruler, and it can't be straight. Didn't you use a ruler? Also, your uneven paddling is caused by uneven exertion during paddling, and more practice can improve it.