The yawn and swallow are passive maneuvers to pop the ear whereby trying to gently blow air out the nose while keeping it pinched shut to create intra-nasal pressure is an active maneuver.
The key concept is that medications do not pop the ears for you... YOU have to pop the ears yourself. Medications just help accomplish this task.
Typically, when things are truly clogged and it is very difficult if not impossible to pop the ears open, actively trying to pop the ears open is key. Yawning and swallowing typically is ineffective.
However, there are patients who can't quite grasp the idea of HOW to pop the ears by nose pinching. OR, they are too scared that they might rupture their eardrums (which could happen if the nose-blowing is too aggressive).
Furthermore, what about the 2 years old who doesn't even understand how to nose-blow let alone valsalva?
As such, there are two main devices to perform the active valsalva for such individuals. Please note, I have no financial ties to either companies to disclose.
The first is a simple balloon called Otovent (can be purchased on Amazon). In essence, you snug the balloon up against the nose and try to inflate the balloon up. The balloon itself provides the necessary and sufficient back-pressure into the nose resulting in an active valsalva. This is mainly used by children who can appreciate the visual feedback.
The second is an electronic device, EarPopper (also can be purchased on Amazon), that pushes air into the nose. So, rather than having the lungs "push" air into the nose to create intra-nasal air pressure, this device replaces the lungs and pushes air into the nose from the front. This device comes in two flavors: Home and Pro versions.
Please keep in mind that there's another electronic device which supposedly helps with ear popping called EarDoc which is not recommended as it uses an unproven concept.
Read more about this condition here.