The comment about temperature is about the water in the reservoir, not so much humidity or temps up above (but they do relate to one another). When the water temp is allowed to stay at 22°C or warmer it can cause bad bacteria growth in the reservoir, which could be part of the delays you’re experiencing.
That water temperature usually sits around room temperature unless the heat from grobo is collecting/recycling (causing it to warm itself up). Moving the air in the room itself might help a bit, it did for me.