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How can I say this in English, I can say it in acceptable ways but not in proper written English. Please help me out as always.
I just want to say to my sister in a regular conversation.My black plastic bottle is so dirty from inside it's bottom and both the side caught so many debris from water, although I filter water before filling the bottle up, Do you know how to rinse the debris out?
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Debris = dirt.

Is your drinking water contaminated with dirt or sand? Normally dirt is suspended in the water and is carried out of the bottle when you pour the water out.. It does not stick to the container.