If you keep your house cool at night, the cool room may be causing the warm moist air from your PAP therapy humidifier chamber to cool, leading to condensation or water build-up in your tubing. To prevent this, you may consider the following options: purchasing a heated hose provided it is compatible with your PAP therapy unit; purchase a sleeve for your hose; sew a sleeve to go over the hose (but ensure it comes off to properly clean your hose); tuck your hose under your blankets to avoid exposure to the cold room; increase the temperature in your home, or decrease your PAP therapy humidifier setting as it may be set too high.