Take off your shirt tonight and look at the vest underneath.
The white one you bought in a pack of three from the shop near your lane. Look at the armpits. Look at the back, between the shoulders. It has gone the colour of weak tea. The cotton there is thin enough to see your hand through. You wear this thing every single day, closer to your skin than anything else you own, and you have stopped seeing it.
Your shirt gets all the care. The ganji gets none. That is backwards.
It takes the sweat first
Think about the order of things on a Patna afternoon in July. Your skin sweats. The sweat hits the ganji. Only what soaks through reaches your shirt. The vest is the first cloth in line, and in this heat it is soaked by the time you reach Boring Road.
Sweat itself is almost clear. The yellow comes later. Your skin puts out oil, salt, and protein all day, and the ganji drinks all of it. If you use a spray deodorant, the aluminium in it meets that sweat and turns a dull yellow that sets hard. Leave the vest balled up in the basket after wearing, let it dry there overnight, and the stain oxidises into the fibre. By morning it is part of the cloth.
Do that a hundred days a year. That is why the ganji yellows before your shirt, your kurta, or anything else in the almirah.
Two mistakes make it worse
Most people do one of these. Some do both.
The first is bleach. You see the yellow, you reach for the strong white liquid, you dump it on. Chlorine bleach and dried sweat protein react and go more yellow, not less. You are setting the stain harder while you think you are removing it.
The second is the sun. Patna sun is fierce, and you hang the wet untreated vest straight into the noon glare on the terrace. Heat bakes the body oil deep into the cotton and locks the yellow in for good. Sun is a good thing for a ganji, but only after you have treated the stain, never before.
There is a third quiet killer. You throw the vest into the machine with jeans, zips, and rough towels. The thin cotton rubs against all of it, load after load, and thins out at the shoulders and pits. Then one day it tears when you pull it over your head.
How to actually wash it
None of this is hard. It takes a few minutes and it costs almost nothing.
Rinse it the same day. The moment the vest comes off, run it under the tap and wring it light. You are washing the sweat out before it dries and oxidises. This one habit does more than any detergent.
Soak the yellow before you wash. Warm water, a spoon of oxygen powder, the percarbonate kind, not chlorine. Half an hour is enough. If you have none, a paste of baking soda rubbed into the armpits and left for twenty minutes lifts a lot. For the smell that survives, a mug of white vinegar in the rinse water clears it.
Turn it inside out. The stain and the sweat are on the inside. That is the side that needs the water and the scrub, not the outside.
Wash it away from the rough stuff. Vests and other soft cottons together. Keep the jeans and the zips in their own load. The friction is what wears the fabric thin.
Dry it in shade or a breezy spot, and only put it in full sun once the stain is treated and gone. Then the sun keeps it white instead of baking it yellow.
And when a vest goes see-through at the shoulders, let it go. It is a few rupees, not an heirloom. A thin ganji stops doing its one job, which is holding the sweat off your good shirt.
The point
You wear the ganji three hundred days a year. It sits against your skin through every Patna summer, every auto ride, every long afternoon. It is not a rag. It is the first line of defence for every shirt you own, and it decides how long those shirts stay white.
Look at it tonight. Then wash it like it matters, because it does.
If soaking vests and sorting loads is not how you want to spend your evenings, hand the pile to us. DoorWash picks up from your door in Patna, washes each thing the way it should be washed, and brings it back folded. You keep the evening.