HM3301 giving erroneously high values

I’ve had this sensor for a number of years at this point, and the values it was giving were unbelievably high. I was kinda worried about blowing some air through it to clean it out, but I used some canned air (which is not crazy high pressure) to clean it, and it’s working much better now. I thought I’d post my experience in case someone else is nervous about blowing air through it. Be careful not to over-rev the fan though - That could damage it. You could put a small screwdriver to hold the fan still while you blow some air through it.

Thanks for sharing your experience.