You can't make cotton totally colorfast, but you can keep them from fading this way: Turn the jeans inside out, then zip and button them. Dissolve a cup of regular salt into a quart of HOT water, and stir until salt is dissolved. Pour into washing machine, then finish filling washer with COLD water. Wash on the gentle cycle, cold wash, cold rinse. Dry wrong side out. You can also use vinegar and cold water, but it doesn't work as well as salt. No, it won't leave your jeans smelling like vinegar.. When the color starts to fade, consider using a temporary color, such as Clairol's Natural Instincts. It's not just for covering gray. It eventually washes out, usually after 4-6 weeks, when you'd probably be re-coloring, anyway. Also, you can leave permanent hair coloring in about 10 minutes longer. It won't hurt, and it will last longer. After coloring, RINSE the color until water runs clear, the condition. Skip the shampoo for the first 72 hours, since it takes the cuticle of the hair that long to close and lock in color. Use a good shampoo and conditioner made for color-treated or dry/damaged hair. I prefer L'Oreal Vive Pro in the hot pink or yellow bottles. Lastly, consider a leave-in conditioner like Garnier Fructis Haircare Triple Nutrition Nutrient Spray for Dry to Over-Dried or Damaged Hair. Before your hair is dry, spritz a bit of this on the ends, and work through with your fingers. I also use Fructis Style Sleek. I married someone whose armpits smell like a mixture of garlic and chrysanthemum leaves. Ick. Try using Mitchum deodorant/antiperspirant. Wash armpits throughly with an antibacterial soap or body wash. Rinse, then watch again. Also, figure out how much onion or garlic you eat on a daily basis. Finally, drink water, then drink more water. It flushes out the stuff rather than letting it ooze out your pores.