ENGINE DOES NOT START | corroded or loose battery cable

Corrosion buildup on a battery terminal appears as a white, blue, or greenish substance with a powdery, granular texture. The color of the corrosion depends on what kinds of chemical reactions have occurred. you will need the following equipment so grab them:
1. A cleaning solution — this can be baking soda and water, a battery cleaner, or even plain drinking soda
2. A battery brush or stiff wire brush for scrubbing
3. Pliers and a wrench to detach battery cables
4. Rags and gloves for cleaning
NB: Before you start on the battery, check it for any bloating, swelling, or electrolyte leakage. If you notice any of these, get a mechanic to look at it instead. If not follow the listed steps
i. Detach the battery cable, how do you do that click here.
ii. Check each battery cable for any damage as it’s a common reason your car won’t start. If any cable insulation is cracked, frayed, or corroded, your mechanic should replace it.
iii. Eliminating Car Battery Corrosion
There are three types of solutions you can use to clean car battery corrosion. However, before you start, do not let any cleaning solution or corrosion elements fall on other engine parts. It’s best if you can take the battery out of the engine bay before you proceed. here follow the solutions
Solution1: Baking solder solution: Take one tablespoon of baking soda and mix it with a cup of water, then pour it onto the corroded battery terminal.
Alternatively, you can coat the corroded areas with baking soda first, then slowly pour on the water.
For very heavy corrosion: soak a paper towel or tissue paper in the baking soda solution and place it on the battery terminal. You can also soak a corroded battery clamp in a cup with the baking soda solution. Leave for about 20 minutes before scrubbing.

Solution2: Battery terminal solution: There are many commercial-grade battery cleaners on the market and typically come in the form of a cleaner spray. A battery terminal cleaner will help clear the corrosion and neutralize battery acid and is probably worth investing in if your battery is heavily corroded.
NB: Make sure it doesn’t touch your paint job, as some terminal cleaning agents can cause a permanent stain.

Solution3: Fizzy drink: This may seem odd, but it does it becuase, any soft drink with carbonic acid (fizzy drink) can loosen battery corrosion too. However, exercise caution here, as these drinks tend to contain synthetic sugars and phosphoric acid that can be damaging to your engine components.
NB: Only use this as a last-ditch attempt when you don’t have access to any other cleaning solutions or mechanics.
iv. After one of the above solutions then, scrub the battery terminal with a wire brush or battery brush to remove the corrosion. You can even use an old toothbrush if you don’t have anything else available. Do the same for the terminal clamp.
v. Once all the corrosion has been removed, rinse each battery terminal and battery clamp with clean water. Let it air dry or wipe it down with a rag. You can use an air compressor to speed up the drying. Apply a protective grease like petroleum jelly onto the battery terminals to lubricate them and prevent future corrosion.
vi. Reconnect Battery. When reconnecting the battery terminals, follow the reverse order of steps you took when detaching the battery. on how to do that click here