1 Wear safety goggles to protect your eyes. 2  Never use a plunger if a chemical cleaner is present in the drain; you risk splashing the chemical on yourself.  Never remove a trap with chemicals present; you risk burns to your skin. Call a professional but make certain you inform them of what chemical you used.
Originally Answered: Why is the Moon drifting away by 1 cm each year? Because of tidal forces between moon and Earth. As Earth and moon pull each other, bulges are created on the surface.
However, the angular momentum of the system must be conserved. So as the Moon's pull causes the Earth's rotation to slow, the Moon drifts farther outward into a longer period orbit. The system will stabilize where the two bodies are gravitationally locked. The total angular momentum of the pair will remain constant. (This is not quite accurate.