How do I prevent AirPods from falling out of my ears

I used ear loops for a long time. Got the cheap from Amazon. They work. But, the disadvantage to them, of course, is that every time you want to use your AirPods, you have to dig out the loops and put them on.

If you're using AirPod Pros which have removable tips, consider getting foam tips. They are also cheap. I got a set and now, my AirPods stay in my ears AND fit into the case. I highly recommend trying them.

You have 14 days from date of purchase to return them for a refund, if purchased from Apple.

If you want to take a chance, I have found foam eartips solved the issue for me.

I personally use Comply brand but there are many different brands available.

I use foam tips found on Amazon

Everyone's ears are different. You may want to look at some third party sellers such as Amazon for ear loops that connect to the AirPods. They are relatively inexpensive and they get good reviews.