Sports T-shirts are made from high quality materials, so they need to be washed in a certain way so as not to damage the fabric. Be sure to treat any visible stains before washing your T-shirts, especially if you're wearing them for sports. Then sort the shirts by color and turn them inside out. Wash the shirts in a solution of warm and hot water and then air dry.
Steps
Method 1 of 4: Treating stains

Step 1. Use a vinegar and water solution to remove grass stains
Mix 1 part vinegar with 2 parts water. If you need to wash more than two heavily soiled T-shirts, use at least 240 ml of vinegar. Pick up a soft toothbrush and dip it in the solution. Use a toothbrush to gently scrub the grass stains. Then soak the treated areas in the solution for 1–2 hours before washing.

Step 2. Use cold water to remove blood stains
Turn the shirt inside out and rinse it under cold water to rinse out as much blood as possible. Soak the shirt in cold water and rub the blood stains gently with your fingers. Repeat this procedure every 4-5 minutes until the stain is completely gone.

Step 3. Use a detergent or shampoo to remove stubborn blood stains
If cold water won't remove any traces of blood, try cleaning the stain with detergent or shampoo. Rub some shampoo or product into the blood stain, and then rinse and wash the T-shirt.

Step 4. Treat sweat stains with vinegar
Green or yellow spots are most likely caused by sweat. Mix 15 ml of vinegar with 120 ml of water. Soak the stain in this solution for 30 minutes, then wash the T-shirt.
Method 2 of 4: Preparing T-shirts for Washing

Step 1. Divide the shirts by color
White T-shirts should be washed separately from colored T-shirts, as the dye can transfer onto the white fabric. Black T-shirts should also be washed separately as they can stain other T-shirts too. All other colored T-shirts can be washed together.

Step 2. Wash T-shirts separately from other clothing
Do not wash T-shirts with other clothing, especially blue jeans. The dye in blue jeans can dissolve in the water and cause blue streaks to appear on T-shirts.

Step 3. Unbutton all buttons
If you wash T-shirts with buttons on, the fabric may shrink. Make sure all buttons are unbuttoned (especially at the front) before washing your T-shirts.

Step 4. Turn the shirts inside out
This is to protect the patches, pattern and stitching on the T-shirts. If you don't turn them inside out, the decorative symbols can stick together and the stitching can come loose.
Method 3 of 4: Washing collectible T-shirts

Step 1. Fill the washing machine with water
Turn on the hot wash mode and fill the washing machine with water about 13 cm. Then switch the mode to warm water and let the machine fill up completely.
If you have a front-loading washing machine, switch the water temperature from hot to warm about 2 minutes after starting filling

Step 2. Add liquid detergent to the washing machine
Use a quality liquid detergent that not only fights stains, but also preserves the color of the fabric. If you need to wash multiple T-shirts, fill the detergent drawer completely. To wash just one T-shirt, fill the compartment halfway. Put the shirts in the washing machine and start the wash.
- There should be a mark on the cap for liquid detergent - according to it, measure out the amount of detergent.
- If you have a front-loading washing machine, add detergent and put your T-shirts down before it starts to fill with water. Switch the temperature setting after about 1 minute.

Step 3. After a minute, pause the washing machine to allow the T-shirt to absorb the water
Stop washing after 1 minute and let the t-shirts soak up the water. This will remove more stains and dirt than with a normal wash cycle.
T-shirts can be soaked in the washing machine for up to one day

Step 4. Wait for the cycle to complete and inspect the shirt
When the T-shirts have absorbed water, turn the washing machine back on and wait until the wash cycle is complete. Then make sure there are no more stains. If there are still stains, re-treat and wash the T-shirts.

Step 5. Hang the T-shirts outside to dry
Do not leave T-shirts in the washing machine, otherwise they may shrink. The stripes and design on the T-shirt can also become unusable. Hang the shirts on hangers to dry. It can take up to two days for the T-shirts to dry completely.
Method 4 of 4: Washing your uniform

Step 1. Wash your shirt immediately after playing or exercising
The longer you wait, the more sweat and dirt will be absorbed into the shirt. Put the shirt in the washing machine right after playing or exercising.

Step 2. Use washing powder
Liquid detergents can contain substances that are harmful to T-shirts, so it is best to use detergent. To wash one T-shirt, use less detergent than for a full load. Use half of the recommended amount.

Step 3. Add vinegar to remove unpleasant odors
If your shirt has a strong unpleasant odor, pour 240 ml of white vinegar into the bleach dispenser on your washing machine. Vinegar will neutralize bad odors, but its own odor will not remain on T-shirts.

Step 4. Turn on the delicate cold mode
The delicate mode will prevent fiber breakdown, while the cold water will protect the decorative elements on the T-shirt. The delicate cycle is usually used for washing underwear.

Step 5. Hang the T-shirts to dry
Do not put T-shirts in the dryer. Heat can weaken the elasticity of the elastic in T-shirts and melt the decorative elements. Hang the shirt on a wooden or plastic hanger and let it dry overnight.