Well, in this case, some positive feedback:
“The new lady who cleans the second floor (her name is Marisela) is very neat. She even tries to clean the dirt on walls. Just wanted to let you know! Much better than the previous man!”
Thanks for the feedback! We will let Marisela know about your comment. We work very hard with the custodians assigned to the Biomedical Library to stress the importance of maintaining a clean facility. With that said, it seems the most important factor is the pride in their work the individual feels. We do our best to let all of our staff, including the custodians, know how much we value their hard work – your comment will help us let Marisela know that our users value her hard work as well.