The only solution: relax the fibers. Not just pulling it out, but first submerging it in a solution of cold water and glycerin (or conditioner) gently stretching the sleeves and edges until your sweater returns to its original size initial. Wring it out in a terry towel and dry it flat, stretching it regularly.
Despite all this, he is subdued?
Soak your sweater for an hour in cold or lukewarm vinegar water.
Fix the colors:
No, the fading will not happen to you!
Will fade, will not fade?
To know this, carry out the test with a damp cotton swab rubbed on the garment. Is it tinted? The color of your clothing may bleed when washed and color everything in its path.
To stop the bleeding: wash your clothing in cold water with vinegar and liquid Marseille soap.
The basics: Sort your clothes color by color to prevent them from mixing. Choose the cold wash program or 30°C maximum. If you choose to wash by hand, proceed piece by piece.
Did it rub off? You can repair the damage using soda crystals. Soak your discolored shirt for a day in 1 liter of hot water with a cup of crystals. If the stain is localized, rub with a paste of baking soda and water, then leave to act before rinsing.
Removing imperfections:
Time passing…
Sweating (the marks): bathe your white cotton T-shirt in a mixture of water and lemon juice. You can also immerse it in a basin filled with cold water and white vinegar (1 glass).
Sweating again (the smell): melt several aspirin tablets in a basin and immerse the clothing in it.
Luster (for black fabric): iron it using a cloth soaked in household vinegar.
Pills: shave them with a razor blade. Or catch them on Scotch.