Although the design and functionality of these lines are very good. They have a strong petrochemical odor that will not dissipate. I've tried letting them hang outside for a few days, even did 2 long wash cycles which didn't change the smell except the same smell lingered in the washing machine. It took a few more cycles to remove it from the washing machine. They leave odors on hands even with minimal handling. The smell appears to be coming from what is in the plumbing. Disappointment!😕