Rubbing alcohol is still not enough. Any needle that is inserted into your body needs to be sterilized with an autoclave.
Cleaning it with soap and water is perfect. Good job on that, most people cake chemicals on their piercings thinking it will help, and it doesnt. Can you describe how it gets yucky? Is it just the buildup of "crusties", or something different? If it is just the crusties all you need to do is soak your ear in warm water and remove the crust gently with a Q-tip. Hydrogen Peroxide is generally not good for piercings and can dry them out and irritate them.
The fact that it was yanked with a comb could very well be the reason for the bump, because it sounds like you are doing everything else perfectly. Sleeping on it just every once in a while usually will not cause such a persistant bump.
Now when the bump rises again, put a warm compress on it for 10 minutes twice a day. This will usually cause the fluids inside to rise to the surface and drain on their own. Dont poke it with a needle anymore because when you do, the fluid just builds back up again. If you allow it to drain on its own, that should take care of the bump. Dont put any unneeded chemicals on your piercing if at all possible, because they will not help this bump.
If you start showing any signs of infection such as severe redness, severe swelling, or a green or yellowish discharge that stinks, see a doctor for antibiotics.
Good luck and I hope this little mishap is gone soon.
