Generally speaking, you can get away with wearing false eyelashes for up to five days. After that, the lashes will start to lose their shape and may shed their natural lashes. Once placed, carefully press the edges of each false eyelash with your fingers to connect it to the eyelid. However, many women aren't sure how long they can wear false eyelashes before they need to be replaced.
You can also buy special boxes for false eyelashes to keep several pairs of eyelashes together and protected, such as this one from Eylure. So how long can you keep your lashes glued together before they start to peel off at the corners? The answer is the same as how long lashes in strips last. Like eyelash adhesive, heavy mascara can build up on false lashes over time, making them too thick and damaging the shape and quality of the lashes. Even if you feel like you look great with false eyelashes on, it's not a good idea to sleep with them on.
When used correctly, false eyelashes don't damage natural lashes and can be used for days at a time. If you can, avoid applying false eyelashes with your fingers, as this can cause some of the lashes to fall off the strip and you'll have to put them back on. Place the false eyelashes on a paper towel, then saturate a cotton pad with an oil-based makeup remover and gently clean the base of the lashes. There is also a risk of eye infections, of accumulation of dirt and germs on the set of false eyelashes, and of damaging the eyelashes themselves, as they can be crushed and torn.
Although it's very tempting to go straight to bed without touching makeup remover, sleeping with false eyelashes is never a good idea. The best place to leave false eyelashes overnight is in a secure storage box, for example, in their original packaging. If you decide to use false eyelashes every day, it's important to take good care of them and let them rest from time to time. It is generally recommended to let false eyelashes separate from natural lashes every few weeks.
If you use heavy or improperly made false eyelashes, they can put unnecessary pressure on your natural lashes and cause them to fall out prematurely. Cleaning false eyelashes regularly (ideally after each use) will keep them clean of bacteria, build up dirt in general, and help maintain their general condition.