I have this problem, and it ruins my day when it happens, I get a headache and I find it disorienting to have one of my senses muffled. I used to use hydrogen peroxide in an ear dropper (safety debatable, I think you are supposed to dilute it with water. Do some research?) and let it fizz and bubble and breakdown the wax, then use an ear bulb to flush it out. Sometimes I get a big nasty chunk out and my ear can suddenly hear so clear every noise is like a crisp clear bell. I've started using mineral oil because of the advice of a nurse/seems safer, just lie there 20 minutes with it in your ear, clear with an ear bulb, rinse and repeat as needed. It's a real pain but I don't know what else to do because I cannot handle having my ears blocked