Return contaminated deposit jars?

Can or should I return contaminated deposit jars normally? Of course, I'll have washed out what I can, but there will certainly still be residues. Possible residues of lead, antimony, barium and sulfur are possible. Do they detect the contamination in the system before something is refilled or is this why these recalls occur where…

What do you do with your empty beer bottles – throw them away or put them in the deposit machine?

Here, you can only return them at Edeka, and there you'll stand in line for 10 minutes before the machine malfunctions or doesn't recognize the glass beer bottles you bought there. So I only buy six-packs and throw the empty glass bottles straight into the trash, while I take all PET bottles (including those bought…