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The sticks have an oily feel with no flavor.
No. The antibacterial ingredients are self-contained in the stick's fiber.
Yes it is! Simply insert it back in the vacuum packaging to retain freshness after usage. Cut the tip off once it gets dry. Brush as normal and repeat until the whole stick is depleted.
Depending on your usage, a single toothbrush can last anywhere from 5-10 days.
Regular usage (cutting off ½" of tip each day): ~10 days
Heavy usage (cutting off 1" of tip each day): ~5 days.