Best way to unblock a drain ?

There are several methods you can try to unblock a drain, depending on the severity of the blockage and what tools you have available:

Boiling Water: Pouring boiling water down the drain can often help to loosen and flush away minor blockages caused by grease, soap scum, or similar substances.

Plunger: A plunger can be effective for clearing blockages in sinks, showers, and tubs. Make sure to cover the drain completely with the plunger and pump it vigorously several times to create suction and dislodge the blockage.
Chemical Drain Cleaners: Chemical drain cleaners can be effective for breaking down organic material causing blockages. However, they can be harsh and potentially damaging to pipes, so use them with caution and follow the manufacturer’s instructions carefully.

Plumbing Snake: A plumbing snake, also known as a drain auger, can be used to manually remove blockages deep within the drain pipes. Insert the snake into the drain and twist it as you push it further down, then pull it out to remove the blockage.

Baking Soda and Vinegar: This natural method can help break down blockages caused by organic matter. Pour a cup of baking soda down the drain, followed by a cup of vinegar. Allow the mixture to fizz for about 15 minutes, then flush the drain with boiling water.

Remove and Clean the Trap: Underneath sinks, there’s usually a U-shaped pipe called a trap. Place a bucket underneath to catch any water, then unscrew the trap and clean it out. This can be effective for removing blockages caused by debris caught in the trap.

Call a Professional: If the blockage is severe or you’re unable to clear it yourself, it’s best to call a professional plumber. They have the expertise and equipment to safely and effectively clear stubborn blockages.
Remember to always take appropriate safety precautions when attempting to clear a drain blockage, and never mix different chemicals as this can create hazardous fumes.