This is actually pretty serious, guys. There are a lot of vapers who use 0 nicotine liquid and believe they have quit nicotine. There is a problem if they are actually still getting nicotine.
Considering that PG and VG don't naturally containe nicotine, there is no reason to expect nicotine to be found in liquid that should contain just PG and flavoring. That indicates serious cross-contamination in the manufacturing process. What else is getting in there?