go over a couple of tips on how to use lye to open a slow-moving drain and you would never want to use this on a completely clogged drain make sure you're wearing goggles and disposable gloves because it's very caustic and make sure you have good ventilation if you have a drain like this I would always use warm or hot water first to warm up the pipes warm water will activate lye and make it work better and you can see how slow this drain is moving and we only need to start with a few tablespoons of Lies so as soon as this water goes down I'll put a few tablespoons of lie right over the opening and then we're going to use warm or hot water just to dissolve it and now we're going to let that move into the drain and start breaking down the clog and you can hear it working make sure that nothing splashes up on you after a minute or so will follow behind this with warm or hot water and you can hear it working down the pipe you can see how quickly it works so just very effective for a slow-moving drain and if you use this once a month you'll keep your drain from being clocked