Bleed gums and tartar with xylitol
I have been using xylitol for some time and have had neither gum bleeding nor tartar since then. Also, the teeth feel really nice clean and smooth.
Just after brushing a half teaspoon of xylitol (looks like sugar, tastes like that, but is a sugar substitute) in the mouth, dissolve the crystals with saliva and "rumspülen" about 3 minutes in the mouth with it. Then spit vigorously - DO NOT rinse - done! You will immediately notice how beautifully smooth your biter feels. The bleeding bleeding was within a few days with me.
To buy there is the powder in pharmacies or on the Internet ... there it is usually cheaper ... just google a little and try it out.