How do you kill water bugs like water striders?

I had pest control come into my apartment(when i even didn't have ANY pests)i then saw a water bug on the wall...i didn't know what it was,i took a look at it from far to see if it would move,so i went to the laundry room,and got Shout out and came to the wall again but i didn't see the water bug.!! so i turned and it was there on another wall...i sprayed it 4 times with shout.!! and I haven't seen any since that occasion...and i made sure to wash and clean my bathroom,kitchen and laundry room with clorox..and it worked!