Bicard works, but you need to grind it.

Charcoal?!

Yes I have tried bicarbonate of soda and lemon and it does work but I wouldn’t use it on teeth if there’s sensitive

Coconut oil……you can do pulling or make a paste with bicarb. Look it up online it’s amazing stuff.

HOW TO WHITEN TEETH NATURALLY WITH TURMERIC
Now, a quick heads up: Your toothbrush will be stained yellow after this. Personally, I don’t mind – I’d rather have white teeth and a yellow toothbrush than vice versa. Also, turmeric tastes much better in a wellness shot than it does as toothpaste, but I do love the results.

Ingredients:
Organic turmeric powder (where to buy organic turmeric)

Method:
1. Wet your toothbrush and then dip it in 1/8 teaspoon turmeric powder. Brush teeth as normal, but instead of rinsing when you’re done, allow the turmeric to sit on your teeth for 3-5 minutes so it can do its magic.

2. Spit and rinse thoroughly, then follow with a second brushing using your regular tooth powder/toothpaste. If you notice any yellow around the corners of your mouth, wash with soap and it will rinse away. Likewise, if any turmeric powder is left on your teeth or gums it will cause a slight yellow tint, but when the turmeric is fully rinsed away you should notice a brighter, whiter smile. I personally think this homemade tooth soap is the most effective at removing the turmeric so you can see the results underneath.

You may notice a difference with the first application. If not, give it a few days to a week – if you’re skeptical I think you’ll be pleasantly surprised!

TURMERIC TOOTHPASTE RECIPE
Ingredients:
1/4 teaspoon organic turmeric powder (where to buy organic turmeric)
1/8 teaspoon melted coconut oil (where to buy coconut oil)
Method:
1. Dip your toothbrush in the paste and brush teeth as normal, but instead of rinsing when you’re done allow the paste to sit on your teeth for 3-5 minutes so that it can do it’s magic.

2. Spit and rinse thoroughly, then follow with a second brushing using your regular tooth powder/toothpaste. If you notice any yellow around the corners of your mouth, wash with soap and it will rinse away. Likewise, if any turmeric powder is left on your teeth or gums it will cause a slight yellow tint, but when the turmeric is fully rinsed away you should notice a brighter, whiter smile. I personally think this homemade tooth soap is the most effective at removing the turmeric so you can see the results underneath.

You may notice a difference with the first application. If not, give it a few days to a week – if you’re skeptical I think you’ll be pleasantly surprised!

3. Clean your sink if needed. Depending on how absorbent your surface is it may stain if left to clean later.

How To Whiten Teeth Naturally With Turmeric – Mommypotamus
http://www.mommypotamus.com/whiten-teeth-naturally-turmeric/
They say a smile is the prettiest thing you can wear. Turmeric teeth whitening is a surprisingly effective way to naturally whiten your teeth at home.

Must admit I have not tried this but it sounds interesting..best of luck
Also if you google natural teeth whiteners there are heaps of tips.
Also a way to stop fluids coating and pooling on teeth is to use a straw, bit strange when you are out at a coffee shop though. Maybe rinsing after consumption is the answer.

some say the inside of banana skin rubbed on your teeth, some say bi carb soda to brush with, others say wear a red based lipstick to make them appear whiter