Put on a pair of rubber gloves. Sweep the Drano crystals into a dust pan with a whisk broom and dispose of the crystals down the drain. Run water in the sink to neutralize the chemicals. Dip the whisk broom in a cup of vinegar or lemon juice. Pour the vinegar over the dust pan.
One of the biggest reasons people get bags under their eyes is because their parents have them. It's in your genes, and -- aside from plastic surgery -- there's not much that can be done about it. When you're young, lack of sleep, lack of exercise, a diet full of salty foods and water retention can also lead to bags.
Since water retention often leads to puffy bags under your eyes, address what causes water retention. One big way to do this is to reduce sodium intake. This is harder to do than it sounds, because so many foods have hidden sodium. Restricting the salt content in your food is a good start, though.