Earlier quoted context omitted.
Yeah! Whatever you do, never eat pretzels! They dip them in oven cleaner before baking, then they sprinkle them with those crystals they use for removing ice from roads!
Lye dipped pretzels are a thing! I didn’t know that thanks!
Sodium carbonate is sometimes used as an alternative to lye for those who don't want to deal with the safety aspect of handling lye, as lye is very caustic. Of course, lye still provides the best results.