If your toilet is clogged, dump a quarter cup of dish soap in the water and let it sit for about 15 minutes. While you wait bring some water to a boil then turn it off. Take the water and dump it in the toiled swiftly. Your clog should flush when you do this.
Drain cleaner maintenance: baking soda followed by vinegar. Bubble bubble boil away trubble.
I love vinegar. Kills mildew, great for removing tarnish from brass and copper too, just soak.
It is ok on routine clogs and hot water and dawn dish soap does well too. I prefer draino crystals because of the heat. It is a trick I learned when living in the most uninsulated house in the western hemisphere. My drains would freeze due to the vent stack being on the outside of the wall. Now, I only get an occasional clog on the slave side of the kitchen sink, but a plunger will take care of that followed by the dawn and hot water. I do have some toxic two chemical drain cleaner I never use. It comes in 2 different bottles you pour in at the same time and run for your life. I keep it just in case because there is a very complicated set of drains converging in one spot under the house--two toilets, two sinks, two stand up showers and one tub all coming together in a short span. If there is ever a clog there, who knows what it would take to clear it.