Ladies, what is the point of going through all the trouble we take spending time carefully removing our make-up each night, and cleansing, and moisturizing, and otherwise taking care of our faces, if the next day, we're reaching into a dirty bag of make-up, using filthy brushes and sponges, and then smearing all of that stuff all over our faces, which leads to future break outs, eye issues, or infections...? Also you have to note that your make-up is like food stuffs; they don't last forever. You should not still be using a lipstick you've had since you were 14, and you're 21 now!
Spring Clean Your Make-up Bag/Box
It is a pain to dump everything out and clean, sure, but putting a dirty used brush or sponge or anything else in your make-up bag or box repeatedly is going to leave dirt and residue in that bag and when you do clean your brushes, etc., simply throwing them back into a dirty bag...well, you get the idea. Take everything out and clean the inside of your bag with an alcohol wipe and/or a make-up wipe. Make sure to really get out any visible streaks or marks or dirt in your bag.
Get Rid Of Old Make-up
As soon as you get some new make-up, get into the habit of putting the date on it somewhere in sharpie on the bottom so you know just how old something is or you can put an expiration date on it, so you know when it's time to toss it.
Disinfect, Disinfect, Disinfect!
Put some Isopropyl alcohol in a small spray bottle and lightly spritz your eye shadows, blushes, and compact powders once a week. Put some on a cotton ball or swab and go over all of your metal tools making sure to get into all the corners and things where gunk can build up.
Use a cosmetic sanitizing wipe to gently wipe over your lipsticks. You can also stick them in the freezer overnight to kill bacteria.
Give your sponges a bath in some liquid soap and water. Let them sit for about ten minutes, and then work into them until the original color is what you see.
Use a ridged brush cleaner or the palm of your hand to get brushes clean. If using your hand, put some soap in your palm (baby shampoo, mild dish soap) and turn on the water and work your brushes into a lather swirling the brush round your palm to get as much make-up out as possible. For the brush cleaner, you'll do the same except instead of your palm run the brush back and forth and around the ridged surface to really get out the dirt and make-up trapped in the center of your brushes. If you're doing the palm method, you can use anything with a smooth ridged surface to really grate your brushes against to get out that trapped in make-up. You may want to consider choosing brushes that aren't all black, so it is easier to see when your brushes are dirty/clean. Tip your brushes, brush side down to try so water won't get into the brush handle.
When You're Sick
It's a good idea to ditch your lipsticks or anything you use on your eyes or mouth when you're sick just as a precaution. Often, if these things aren't cleaned, you throw them back in your bag, use them later, and can actually make yourself sick again by using them after you're well again.