Get as much of the tea noodle as you can with a fabric. Apply water to the tea stain, but be careful not to have too much (too much stain may spread or dryness of the carpet becomes more difficult). Gently wipe the stain with a cloth. Then use a carpet stain remover and follow the instructions on the package.
If the tea stain still does not come out, apply some white vinegar to the stain with the help of a fabric. Leave the carpet for seven to ten minutes before rinsing with a sponge and water.
Another solution for your stain is to mix the detergent with a teaspoon of demineralized detergent, a teaspoon of white vinegar and two thick hot water, and begin to clean the carpet with a clean cloth (take as much of the tea as possible from the tea rug). Apply the detergent / vinegar mixture with small touches until the tea stain disappears. Clean it with cold water and sponge before allowing to dry normally.