Chronic sinusitus since using cpap. i keep it clean. cpap tech says it ok to put 1 drop of grapefruit seed extract in h2o chamber nightly. is it safe?

Depends: It is a popular method of sanitizing the h2o chamber. However if you look at the science, the evidence that allows docs to recommend its use as an antimicrobial agent. Not quite scientists investigated gse. The naturalgse is not an antimicrobial agent. Most of the commercial gse preparations were contaminated with chemicals that have antibacterial properties. Gentle soap ; use distilled h20 ok.