Your GI takes a beating every session. Treat it right and it'll outlast three of your training partners'.
Wash cold, wash fast
Always wash in cold water after every session — hot water shrinks cotton and fades color. Turn the jacket inside out and skip the fabric softener (it coats fibers and traps odor).
Never tumble dry
Heat is the enemy. Hang dry in the shade. A dryer will shrink even a pre-shrunk GI and break down the weave over time.
Kill the funk
For stubborn smell, soak in a half-cup of white vinegar before washing. It neutralizes bacteria without harsh chemicals.
Do this and a quality pearl-weave GI will stay competition-sharp for years.