If you need to adjust your brakes with a spoon, something is wrong. The self adjusters should be doing that for you every time you stop while rolling in reverse.
It is common for an adjuster to seize up due to rust or dirt. It is fairly easy to remove it, clean it and apply a small amount of brake grease to the threads. Just be sure to install it the way it came off. If it is on backwards, it won't work.