it’s a matter of personal preference but i think most people would benefit from having at least two sprayers: one for killing (or dedicated roundup) and one for feeding. it’s good practice to flush them out after every use regardless. when i upgraded i dedicated my first sprayer to be my killer sprayer. i use “bifen it” often throughout the summer for pest control around the house and property so i like the convenience of the small handheld battery powered sprayer for that purpose.