Nobody likes eye infections or rashes. Makeup can be the absolute worst for collecting bacteria so it's really important that you keep your brushes and sponges clean. Also make sure your hands are clean before application!
3. Use particular makeup care with products that you use on or near your eyes. Mascara should only be used for two months or replaced even sooner if its color or smell begins to change. If you've had an eye infection or cold, for example, be sure to clean eye makeup immediately, particularly mascara. Some mascaras last longer like my £20 version but I buy bacteria wipes from any grocery store and just ensure that I am constantly keeping the wand clean.
4. Replace solid, stick-type makeup at least once a year, particularly if it's a stick concealer or foundation product that you've used to dab on blemishes. It's also important to keep makeup sanitary by touching only a clean makeup brush or applicator to the bottle instead of your fingertip to minimize germs.
5. Buy some disinfectant wipes and use them frequently to wipe down your brushes after use. I like to give my concealers and lipsticks a gentle wipe and clean off any old residue before use. This will keep the makeup looking fresh and therefore better on your face.