There is NO such thing as a healthy way to smoke. There are three main components inside of a cigarette that cause the most damage: Nicotine, Tar and carbon monoxide.
As far as trying to wash your mouth out, that doesn't really do much. You can still get cancer, heart disease, lung disease, etc.
this is where hope comes in. Your wanting to quit, and trying is great. Now you just have to take small steps to be smoke free and you can be. Start by making a list of reasons you need to/should/want to quit.
Nicotine Gum, Patch, Inhaler, Spray, and Lozenges are all good things to help (if they are right for you. Make sure of that first by talking to your doctor). To be honest, I think gingivitis is better than illness or death. It can be treated. Make sure you have loved ones that know you're trying to quit, build a support system. Also keep busy, make sure your hands are busy.
Do you have any triggers? The things that tempt you. Stay away them like other smokers. Meditate, work on slow breathing when you're stressed out maybe play some music you enjoy.
If you get an urge, change your scenery try going outside. Here are some links I found for you to check out:
http://www.naquitline.org/index.asp?dbsect
ion=map&dbid=1
http://www.smokefree.gov/quit-smoking/reso
urces.html
http://whyquit.com/
http://quitsmoking.about.com/
Also, if you can find a support group that would help you out.
Best of luck,
Kat