Some nasal sprays do seem to be effective as prophylaxis for COVID infection. I'm not sure about Xlear, but povidone-iodine nasal sprays seem effective and are

Some nasal sprays do seem to be effective as prophylaxis for COVID infection. I'm not sure about Xlear, but povidone-iodine nasal sprays seem effective and are already used as prophylaxis by dentists. See: https://scholar.google.com/scholar?hl=en&as_sdt=0%2C48&q=povidone+iodine+prophylaxis+covid&oq=povido#d=gs_qabs&u=%23p%3DxY_LFXHlVxYJ https://scholar.google.com/scholar?hl=en&as_sdt=0%2C48&q=pov... https://jamanetwork.com/journals/jamaotolaryngology/fullarticle/2775984 https://jamanetwork.com/journals/jamaotolaryngology/fullarti... They're not FDA-approved for this but as long as you're taking other precautions, they can't hurt right?