"The only thing I can say is that, you know, they've not always been right," Humiston said.
Then there's the issue of our first-time tanners being told they could come every day to tan.
"I would be discouraged if I heard that they were taking someone that just, just had never tanned before, and said they never tanned before, and they recommended beyond where they should be recommending," Humiston said.
Chang asked Humiston about young tanning salon employees giving false information and if the tanning industry should do something about all the misinformation.
"If it's as prevalent as what you, as what was, as what we're finding out through your investigation, you know, maybe we could do a better job," he said.
Amanda Ahrens wishes that she could take back the years she spent baking under tanning lamps.
"Tanning beds caused this and I had no idea," Ahrens said. "They tell you this may cause skin cancer, but do you really think it's going to? Of course not. So I, I learned that yes, it does."
Ahrens said now she never leaves the house without sunscreen and lives in fear that her cancer could return.
Chang asked Ahrens what she would say to young people who think there's no link between tanning beds and cancer.
"I show them my scar," Ahrensa said. "They just really don't know the true dangers involved with tanning beds ... and what it can do to you in the moment, as well as the rest of your life."
Watch the investigation on "20/20" Friday at 10 p.m. ET