[stdbrouw]

Don't know about the pods, but for a while we used DIY dishwashing powder with soda crystals as the main ingredient, and after a while you could definitely notice slight scratching of glassware, and any printing would fade pretty heavily. Not sure if that's a chemical process or simply the abrasiveness of the powder.

[eru]

Oh, dishwashers are definitely hard on printing on glasses.

I'm not sure about scratches. I can imagine you would get scratches if your detergent (especially crystals) doesn't completely dissolve? I mean, people even sometimes use sugar as a scrubbing agent. Dissolved sugar can't scratch anything, but sugar crystals can.

[maxerickson]

It's likely chemical.

https://www.maytag.com/blog/kitchen/how-to-prevent-etching-g...