The whole point behind washing your hair less often is to give your sebaceous glands the chance to learn to produce less oil.
If you are you washing your hair every day you aren't giving your sebaceous glands the chance to.
If you have to just go through the motions of washing your hair without actually using anything that would remove any oil. (IE: Get your hair wet, use your palm or fingertips to help loosen any dirt, etc.)
The only reason you "Can't seem to get into the habit of washing your hair less often" is the fact that you either don't have the determination, desire, and/or dedication to do so.
If you don't have the desire, the dedication, and the determination to do something, you won't do anything.
Joe: Rinse your hair with plain water after practices.
updated by @opaulao: 07/18/15 08:22:17AM