[fullstop]

Pallets are often treated with chemicals, so keep that in mind.

[yetihehe]

That's why I wrote that they are clean, I keep that in mind, but thanks for noticing.

[fullstop]

You said "mostly clean" and I assumed that this was about dirt and debris, and the stuff they're treated with is not visible. There is a stamp on the side which shows how they have been treated, though.

[kwhitefoot]

True but it's very much not all pallets. EUR pallets are mostly heat treated. Some are methyl bromide fumigated but that is banned in Germany.