This may sound like an odd clogged ear remedy, but I have occasionally used a vibrating body massager to relieve pressure in my ear canals. I'm talking about those handheld electric massagers that people use on sore muscles. What I'll do is set the massager on its lowest position and place the massaging tip in the space between my ear and jawline. Sometimes I will place it directly over my ear canal, depending on the location of the blockage.
Just a few minutes of massage will sometimes cause my ear canal to pop open and release any trapped fluids. The sound of the massager's motor can be a little loud, but the relief is worth the temporary discomfort. I don't apply much pressure to the massaging tip, just enough to get the inner ear to start vibrating and tingling.