Trim Snake plants are quite easy.
Use a sharp sterilized tool to cut off the leaves just above the soil line above the leaves to be removed. Take care not to damage the adjacent leaves. In addition, don’t cut the leaves partially. Please do not simply remove the imperfect parts of the leaf.
Exposed leaf parts can attract various pests. The plant becomes susceptible to diseases as a result. Cut off only highly damaged leaves, and don’t worry about small defects. Trim snake plant for a particular reason will determine which leaves to cut.
Read more here: https://allthingsgardener.com/how-to-trim-snake-plant-superb-tips-2021/