WHAT TO DO TO REMOVE GREASE STAINS THAT HAVE SET INTO THE LAUNDRY

After applying the grease-fighting stain remover directly to the grease stain that has set in, be sure to follow the recommendations provided by the manufacturer.
The product should be allowed to permeate the cloth for the exact amount of time that is advised.
The third step: Proceed with the Typical Laundering:

After pre-treating the garment with the stain remover, the garment should be washed the way you normally would, following the recommendations on the care label.
Be sure to inspect the discolored area before it dries. The pre-treatment technique should be repeated if the stain continues to be present, or you may want to consider hiring a professional cleaning service for sensitive materials.
How to Achieve Success:
Take prompt action: Grease stains should be treated as soon as possible in order to prevent them from becoming embedded in the fibers of the fabric.
The use of cold water to rinse and pre-treat grease stains is recommended since the use of hot water might cause the stain to become even more permanent.
Steer Clear of Heat: Until you are certain that the grease stain has been entirely gone, you should refrain from drying the clothing in the dryer. Discolorations may be permanently established by heat.
Before using any stain remover or detergent, it is important to test it on a concealed section of the fabric to see whether or not it won’t affect the colorfastness of the fabric and whether or not it will cause any harm.
Repetition is Required: Grease stains that are difficult to remove may need numerous treatments. When attempting to remove stains, it is important to be patient and persistent.
You will be able to say goodbye to grease stains that have set in and become obstinate on your clothes if you use these practical procedures and recommendations. You may restore your garments to their original, perfect state and prolong their lifetime if you take prompt action and make use of the appropriate goods and procedures. Make sure that grease stains do not spoil your favorite clothing by tackling them head-on. This will ensure that you always have clean laundry to put away.