Thank you all for your responses.
I use an Arduino Uno and it is power by a power supply of 9V/1.5A . The sensors are power through arduino's +5V output.

Hi everyone,

I am building a automation system in order to cultivate mashrooms in a closed environment and I want to keep the humidity around 75%.

I used DHT22 temperature/humidity sensors but after a few days the measurements were about 99% RH and I suppose that the sensors broke down due to high humidity environment. What do you think about that?

I am thinking of buying better sensors which can hold longer. I have found these:
https://www.adafruit.com/product/1293

Do you have any suggestions? How can avoid the damage of the sensors by high humidity enviromnents?