The volume of my AirPods it's really low

i tried cleaning my airpods gently with a dry cotton swab (like the website recommended) because the volume in both were very low and now they are even quieter. I have the volume all the way up and it sounds like it’s on 2. what should i do? i’ve had original airpods for about 2 yrs?

[Re-Titled by Moderator]