Write the next sentence in the following story.

How to get rid of silverfish
Figure out where they're lurking.
Since silverfish are nocturnal, you may not see them during the day. Rather, you'll probably become aware of their presence because of what they leave behind.
Look for damp, dark areas with small spots of excrement that look like black pepper. Small holes and yellowish stains on clothing, wallpaper, cereal boxes, and other cardboard or fabric materials also indicate they're nearby.