Keda,
I think I may be going through the same thing. About three weeks or so ago, I was just swimming and had some wax blockage, especially in the left ear. Had the ears flushed at my primary doc but still had a muffled left ear. Also felt like my cheek was sore (like when I have a sinus cold during the winter or something). Did some diving after that and had no issues clearing for depth but lots of crackles and pops in the left when I ascended. Left ear still muffled. Went to an ENT and they had me do a hearing test and put me on a steroid and augmentin. I was worried that I might have frigged my ear for diving. The test showed the left ear hearing was indeed less (because it is still somewhat muffled). Since then I've been hearing crackling and popping in the left as it is trying to breakup and release. And at times it does pop clear, but then gums up again. Slow process, but it is getting better.
Yup, mine does that as well. The crackles and pops are softer and less frequent so I do think it's slowly improving, but in the left it gums up again quickly and I can feel a definite difference between the right ear which feels open and clear and the left which feels a bit stuffy/full (less so not but still full).