Bob took home a baseball cap that he found in the trash.
That's gross. Why did he take the hat from the trash?
He really liked the design but it was really dirty.
That's cool that he found something he liked and was able to get it for free but I really hope he cleaned it off before he took it home and especially before wearing it. Things you get from the trash are inherently dirty so you need to clean them off. You end up bringin more dirt and germs home otherwise.
If you wash it off, it won't have any dirt left.
Washing will help eliminate the dirt from things in the trash but you should do more to clean it like use soap to get rid of anything else before you take it home. You wouldn't want lice from the cap to settle in your hair.