As lilies open, stamen begins to pollenate which can stain hands and clothing. To eliminate this possible problem, remove the stamen as the lily begins to open. There are 2 methods to easily remove these stamen:
You can easily pull off the not-yet-pollenated stamens by hand.
If you prefer to leave stamen intact, you may spray plain, unscented hairspray directly onto the stamen which will inhibit them from pollenating. This will not damage the lily petals as long as the hairspray is unscented (the fragrance from the hairspray contains alcohol and can burn or damage the lily petals).
If you have more than one lily per stem, it can happen that after seven to ten days, one flower may die before the other buds have opened or fully bloomed. Simply cut this single flower off with a scissor and allow the other buds to open to full splendor.