How long can you leave drano in the drain? Drano is highly effective at clearing clogs due to soap scum buildup, hair, grease, and other soft matter. Pin On Bathroom Sink You have to pick the type of plunger depending on your requirements. Does drano work on bathroom sinks . You probably know it as one of the most popular cleaning products for kitchen sinks and showers, but should you use drano in a toilet? No, you shouldn’t use drano in a clogged toilet because cleaning bathroom drains is not its purpose. If drano doesn’t work in your shower drain, bathtub drain, or kitchen sink, you can try using a plunger. Is drano safe for bathroom sinks? Drano max gel contains acids that can cause serious irritation if it comes in contact with your skin or eyes. Click to see full answer. It clears most clogs in kitchen and bathroom sinks, garbage disposals, and shower drains within 30 minutes. Drano® clog removers can unclog a drain fast. The truth is, while products such as ...