Mouthwash Woes

As part of my new dental hygiene regimen, I've been following up my brushing and flossing with rinsing with mouthwash to kill all those pesky germs that cause gingivitis. Well, my toothpaste and mouthwash of choice are both Crest ProHealth. Since I've been paying more attention to my teeth lately, I quickly noticed that I was getting some increased staining. I honestly thought it was related to the copious amounts of tea I drink, so I didn't really think twice about it. Well, at this recent dental appointment, the hygienist noticed, too and immediately asked if I use Crest ProHealth mouthwash. I thought she was about to compliment me, so I quickly said "Yes, indeed, twice a day!" She said, "well, that explains why both the front and back of your teeth are so incredibly stained. The flouride in Crest ProHealth is very staining. I'll have to work hard to remove these." When I mentioned that I also use Crest ProHealth toothpaste, she said it's the same deal. She told me to switch to Colgate Total toothepaste and Listerine. So, I just happened to have a sample of Listerine - the blue one, not the original yellow - and started using it that night. I numbs my tongue the minute I put it in my mouth. After 30 seconds of swishing, I can't feel my tongue or the insides of my lips and cheeks. I thought it was a fluke, but it happens EVERYTIME I use it. It only lasts for 10 to 15 minutes, but it's really uncomfortable! I've been asking around and searching online, but no one I know has had the same experience. I have found a few accounts of something similar online, but no one states whether or not the numbness will stop happening. Michele says it's from the amount of alcohol in Listerine and I'm sure that has something to do with it. Not being a drinker, I wonder if the 21.6% alcohol numbs my mouth, does whiskey, vodka, and other strong spirits numb people up, too? Food (or drink) for thought, indeed!