Mask Fit Mastery: Stop Leaks & Get a Perfect CPAP Mask Seal

March 24, 2026

A great night's sleep with CPAP doesn't come down to the machine alone—it comes down to the seal. Even the most advanced therapy can be compromised by small mask leaks, leading to dry eyes, noisy airflow, and inconsistent treatment. The good news? Most mask issues aren't about the mask itself, but how it's fitted, adjusted, and matched to your face. In this guide, we'll break down how to master your mask fit, eliminate leaks, and achieve a comfortable, reliable seal that helps you get the full benefit of your therapy—every single night.

	The "Lying Down" Rule Many users fit their mask while sitting in front of a mirror. However, gravity shifts facial tissue when you lie down. Mastery Tip: Always finalise your CPAP mask fit while in your actual sleeping position. Adjust the straps only when you are horizontal.
	Stop the Overtightening Trap This is the most common mistake. Overtightening crushes the silicone cushion, preventing it from inflating and creating a seal. The Fix: Loosen the straps, turn the machine on, and let the cushion "balloon" against your face. Tighten just enough to stop the hissing.
	Identifying the Type of Leak Not all leaks are the same. Eye Leaks: Usually caused by the bridge of the nose being too narrow or the top straps being too loose. Mouth Leaks: If you use a nasal mask but wake up with a dry mouth, air is escaping through your lips. Solution: Consider a chin strap or switching to a full-face mask.
	The "Clean Seal" Routine Skin oils, sweat, and moisturisers break down silicone. A dirty mask will never seal perfectly. Mastery Tip: Wash your face before bed to remove oils and use CPAP wipes daily on the cushion. Shop our range of cleaning products that are specifically for CPAP maintenance.
	Contact Our Experts A perfect CPAP mask seal takes patience and a bit of trial and error. If you've tried everything and still have CPAP leaks, it might be time to resize your cushion or try a different mask style. If you need help or have any questions, please contact our expert team or visit a clinic today.

The "Lying Down" Rule

Stop the Overtightening Trap

Identifying the Type of Leak

The "Clean Seal" Routine

Contact Our Experts