“What's with all the dry cleaning?”
When you come home, there are a lot of dry cleaning bags hanging in the closet. You wonder why your husband cleaned so many things. You ask this.
What's with all the dry cleaning?
"What's with ___?" is a casual way to ask why something is happening. For example, if one of your coworkers is yawning a lot, and you want to know why, you can ask:
This means "Why are you yawning so much?"
"What's with ___" is used in informal spoken English and when chatting online. It doesn't have any strong positive or negative associations.
"Dry cleaning" is a type of cleaning process for clothes like suits and sweater. You don't do this at home; you take your clothes to a "dry cleaner", which is the name of the business.
The phrase "dry cleaning" can mean the process of cleaning clothes:
Conventional dry cleaning uses a lot of nasty chemicals that are harmful to the environment.
It's also what you call the clothes that have been cleaned. For example:
Can you pick up my dry cleaning on your way home?