Ask 2: Does Xlear nasal spray really work to fight against COVID-19? Tags: Xlear Nasal Spray with Xylitol (Xlear) At KPRC 2, we’re dedicated to keeping Houstonians informed. As part of our Ask 2 series, the newsroom will answer your questions about all things Houston. Question: Does Xlear nasal spray really work to fight against COVID-19? Answer: It’s unclear at this time and more study is needed, though there are those claiming its benefits. New, but some very small studies, say the use of Xlear nasal spray could reduce the risk of becoming infected with COVID-19, according to Dr. Gust...