I have a clogged ear. there has been hard white build up in the past. what can i do to clear the build up? how do i keep from getting this build up?

Cerumen: If the ear wax is solidly impacted, I'm afraid that the over the counter home irrigation kits with ceruminex or debrox won't be effective. To do the job a physician, physicians assistant or an otolaryngologist are best qualified to remove the impaction by skilled irrigation or aspiration techniques. To prevent further ear wax accumulation, put 1 drop of hydrogen peroxide in each ear once daily.