My chiller is behaving oddly. It's only 60 degrees farenheit in the room but it's having trouble chilling the water down to 19 degrees Celsius even with the laser not running for many minutes at a time. It's a CW 6000 model so it's typically a beast, and has no problem chilling the water down to 19 degrees C even in 110 degree weather normally. I've cleaned the filters, checked the water level. What am I missing?