Dryer sheets are hard to come by when you are not in the US. Instead use an old towel, pour a couple of capfuls of fabric softener on it and throw it in the dryer with your clothes. Add more fabric softener every 15 loads or whenever you notice a little static. Use a towel that is distinct from your other laundry so it is easy to pull out and save for the next wash day.
Turn dark clothes inside out when washing and hanging in the sun to dry.
Sprinkle a generous amount of cornstarch or baby powder over the grease stain, allow it to sit for a couple of minutes, then brush the powder off. The powder absorbs the grease and it brushes off with the powder.
Place a fabric softener sheet in the bottom of your laundry basket or sprinkle some baking soda in the bottom of your basket and that will help absorb the odors as well.
Shake or brush the item to remove any loose growth. Presoak in cold water then wash in hot water with heavy duty detergent. For whites, add 1/2 cup bleach. If colored, use color-safe bleach. If stain remains on white items, repeat washing before drying. Dry thoroughly; heat and sun kill mildew.