yes i've noticed this with two of my teeth. i usually dip my floss in grapefruit seed mouthwash in those areas a few times a day to help with the odor there. i also realized that on those two teeth, my gums are receded. are yours? maybe thats the cause? well in a couple of weeks i'm gonna have them pulled. ( for braces ) i was kinda happy when i found out that those two were the ones that had to be pulled. i'm hoping that once their gone the problem will be solved. anyways...floss with gse mouthwash...a few times a day...it'll help some..wish i could be more help..hopefully someone else will be more helpfull. good luck -j