Do You Test Your Hygrometers for Accuracy?

[PsychoSnake]

In the event of my recent RI saga with my female retic I've learned that out of four hygrometers I used with her (two analogue, two digital), only the cheap analogue ZooMed hygrometer was correct. How did I come to this conclusion?

I noticed that despite my snake room feeling sweltering hot and humid most of my hygrometers could not agree on a percentage and most showed that the humidity was low. I had three humidifiers running at the same time. Obviously, something is wrong with this picture and it needs to be fixed to help my retic get over her RI. That's where I came upon the salt test, used to test hygrometers in the cigar hobby.

Evidently if you make a small mixture of two parts table salt to one part water (consistency of wet sand) and place both the mixture and hygrometer (not touching!) into a Ziplock bag for 8-12 hours, the correct reading on the hydrometer should be 75%, which was exactly what my cheap ZooMed hygrometer came up with. The others were about 20-25% off.

I have never heard of this test in the reptile hobby so I thought I would share.