Don’t that will hopefully help should your guests decide to get lash extensions:
The first 24-48 hours are crucial. Avoid steam from showers, facials, saunas, and swimming pools, as any excess moisture will break down the adhesive.
The less her do, the longer her extensions will last—meaning forgoes the mascara (especially waterproof kinds), lighten up on the shadow and liner, and ditch the lash curler. Lash curlers, in particular. Lash curlers are very damaging to extensions and can lead to breakage.
If she decides to wear any shadow or liner, use an oil-free makeup remover or wipes, like Almay Oil-Free Makeup Remover Towelettes ($6.50, ulta.com) to take it off. Wipe upwards towards her brows instead of down. Basically, she wants to avoid getting too close to the lashline.
Pick up some disposable mascara wands for daily cleaning and maintenance. Brush the tops of her lashes to remove any lint or dust. Then, work the brush through from mid-lengths to ends like she would when applying mascara.
If she tends to curl up onto side when sleeping as I do, just position her head on the pillow so her face—and lashes—aren’t smashed against it.