How to remove a yellow leaf
One fully yellow old leaf can often be removed. If several leaves are yellowing, first check why.

Before you start
Choose an old leaf that is fully yellow or dry. Trace its stalk to the main stem or base, and find any buds or newer leaves nearby.
How to do it
Hold the leaf so you can see its stalk. Snip the stalk near its base with clean scissors without cutting the main stem or a new bud. Avoid pulling if the leaf does not release easily.
When to stop and recheck
If the leaf is still partly green, you can leave it. If several leaves are yellowing or the plant is wilting, check moisture and roots before removing more foliage.