Free Republic

The anti-fogging sprays and cloths that have become popular to help stop glasses from steaming up when wearing a face mask may be exposing users to carcinogens. That is the warning from Duke University-led experts, who found these treatments may contain cancer-causing per- and polyfluorinated alkyl substances (PFAS). The team subjected four anti-fogging sprays and five anti-fogging cloths — all of which have received top ratings on Amazon — to high-resolution mass spectrometry. Specifically, the chemical analysis found that all nine products contained so-called fluorotelomer alcohols (FTOHs) and fluorotelomer ethoxylates (FTEOs). These are two types of PFAS that have, until...