5 Common Mistakes People Make When Using the ResMed AirFit F20 — and How to Avoid Them

The ResMed AirFit F20 is one of the most popular full-face CPAP masks, loved for its comfortable fit, reliable seal, and modern design. However, even the best mask can underperform if not used correctly. Small mistakes can lead to discomfort, air leaks, or reduced therapy effectiveness.

In this blog, we’ll uncover five common mistakes AirFit F20 users make — and how you can avoid them to get the most out of your CPAP therapy.

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1. Wearing the Mask Too Tight

The Mistake:
Many users think tightening the headgear will stop leaks, but in reality, over-tightening can cause discomfort, skin marks, and even more leaks due to cushion distortion.

How to Avoid It:
The AirFit F20 is designed to work with a gentle seal. Adjust the headgear so the cushion just rests comfortably against your face. Use the mask’s fitting guide or try adjusting while lying in your normal sleeping position to ensure the best fit.

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2. Ignoring Mask Cleaning

The Mistake:
Skipping daily cleaning can lead to skin irritation, bacteria buildup, and a slippery cushion that won’t seal properly.

How to Avoid It:
Clean the cushion and frame daily with mild soap and warm water. Rinse well and let it air-dry. Deep clean the headgear weekly to maintain hygiene and extend mask life.

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3. Using the Wrong Cushion Size

The Mistake:
If your cushion is too small or too large, you’ll experience frequent leaks and discomfort, especially around the nose and chin area.

How to Avoid It:
Measure your face using ResMed’s official sizing template or consult your CPAP provider. The AirFit F20 comes in small, medium, and large — the right size makes all the difference.

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4. Not Replacing Worn-Out Parts

The Mistake:
A worn cushion loses its sealing ability, and stretched headgear won’t hold the mask in place. Many users keep using old parts, reducing therapy efficiency.

How to Avoid It:
Replace the cushion every 1–3 months and the headgear every 6 months, or sooner if you notice wear. Always use genuine ResMed parts for the best results.

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5. Ignoring Proper Sleeping Position

The Mistake:
Side-sleepers often push the mask out of place, causing leaks and discomfort without realizing it.

How to Avoid It:
If you sleep on your side, use a CPAP-friendly pillow with cutouts to prevent pressure on the mask. Adjust your sleeping position to keep the mask stable throughout the night.

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Final Thoughts

The ResMed AirFit F20 can deliver exceptional comfort and performance when used correctly. By avoiding these five common mistakes, you can improve your sleep quality, reduce mask issues, and make your CPAP therapy more effective.

If you’ve been struggling with leaks, discomfort, or poor results, take a moment to review your mask habits — small changes can make a big difference in your therapy experience.