Same as acrylics, unless there is any lifting there is no way nasties can get in between.

And yep Willow I think we have chatted about it a few times

Zander has come to 90% of my appointments & never had an issue with the smell. I was concerned originally when I was pregnant about the fumes etc but found out it was perfectly safe, so it would be once they are out in the world as well. The smell is a bit yucky, but he's not bothered by it (probably used to it!).