The first time my kitchen sink clogged, I did what any rational person would do: panicked, then drove to the hardware store at 9 PM. Twenty minutes later, I was pouring a neon blue liquid down my drain with the confidence of someone who clearly had everything under control. By midnight, my sink was draining again. Victory! Three weeks later, when the clog returned with a vengeance, I realized I’d made a rookie mistake that…