No need to wonder, extra chemicals heated on your skin, repeatedly, likely not the best idea.
I was talking to a friend about how our parent’s generation never went to the dermatologist and there was not much talk of skin cancer. Now everyone seems to get at least actinic keratosis, or even basal cell carcinoma while slathering on the sunscreen.
Maybe the increase in skin cancers is because we are living longer, but it’s just another thing that makes you go Hmmmmm.