Runny nose after using CPAP

I have environmental allergies and have been on medication for 2 weeks. Sometimes I am stuffy, difficult to breathe and sometimes I have a very runny nose. I have been on the CPAP 3 nights. I woke up this morning with a very runny nose, sneezing, etc. It hasn’t stopped. My humidity was set at 1. Should I increase the level? I can’t find specific info about this.