right earbud blocking airflow, casues pressure buildup inside of ear

@miguelmoretti try some isopropyl alcohol and a few puffs of compressed air. Use something like air-in-a-can that you would use as a keyboard duster. Available in most department stores. Alternatively, you could use some suction from a small, yet strong vacuum cleaner or similar device (like a big 60ml syringe attached to a small hose etc.). Those things love to collect cerumen (earwax) If that does not work you will most likely have to disassemble them (no fun at all) and clean it from the inside out. Samsung Galaxy Buds Pro Teardown - iFixit

I had the same problem with my right earbud. What I did was get a Q-tip and isopropyl alcohol and really worked it into the grille on top and the small one inside the bud. I took the rubber earpiece off and blew into it gently, then sucked gently. Doing that twice fixed it for me. You won't feel yourself losing pressure, but it definitely worked.