[Fradow]

To be fair, that's something you learn as soon as you start 3d printing. Anything that experiences repeated stress and have any chance of getting over room temperature during summer should not be printed in PLA. And near a computer heating up, it sure looks like it's going to be higher than room temperature. Also pictures in a train exposed to sunlight via glasses are another reason for concern.

Compared to PLA, PETG has higher temperature resistance (by about 20°C), isn't quite as susceptible to stress, doesn't cost more and isn't any harder to print on modern printers.

Some people in the 3d printing community have totally ditched PLA and use PETG as a baseline because of that.

[johnwalkr]

I use ABS as a baseline, it holds up well, is easier to sand than most other materials, and is soluble in acetone which gives you some nice methods for smoothing layer lines as well as adhering parts together. It requires a heated chamber though.

[dghlsakjg]

ABS also emits potentially toxic, and certainly unpleasant, fumes, so you need a good carbon filter and ventilation system!