If someone has mice, an exterminator is very expensive. As far as traps go, whether the snap or glue type, they usually catch at the begining, but the rest get smart and stay clear.
What I recommend is products from Tomcat. They almost always get rid of them. They have traps, but I don’t know how well they work.
There are 2 types of poison bait out there -Decon & Tomcat.
Decon works some times -not all mice/rats go for the bait. Tomcat works almost always. You put out the bait and you usually don’t ever see them again. (Don’t ever touch any bait with your hands. Including but not limited to, peanut butter, cheese, poison bait. Your smell will keep them away.) They take it with them to their family and return to their nest. They die there.