Years ago, we used canned air as freeze spray in the lab for preparing certain cultures.
I picked up a new case on my way in one day, and probably 20 minutes into using it, someone said "do you taste that?"
We ended up evacuating and later discovered the cause was an undisclosed bitterant added to the product. I sent 3M an invoice for the lab cleaning (they politely declined to pay), but the next time I saw the bottles, they had a big warning on them.
I picked up a new case on my way in one day, and probably 20 minutes into using it, someone said "do you taste that?"
We ended up evacuating and later discovered the cause was an undisclosed bitterant added to the product. I sent 3M an invoice for the lab cleaning (they politely declined to pay), but the next time I saw the bottles, they had a big warning on them.