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.
In any case, we see only a portion of the moon at a time as it keeps moving in its orbit. The reason why we see moon growing (waxing) and shrinking (waning) is because of the light of the sun emitted by the moon to us. There is no light of the moon, and it only emits the light of the sun falling upon itself.