Conventional showerheads are those that pre-date Energy Policy Act of 1992 (EPAct 1992) and use 3.5 or more gallons of water per minute gpm.
Use cleaning chemicals and solutions that are Green Seal certified
A two-step process should generally be used if cleaning with antimicrobial products. Clean first and then apply the disinfectant. Wait the recommended time before rinsing (usually at least 10 minutes); perform other tasks while waiting for the antimicrobial to take effect. Most disinfectants are not cleaners, and are usually only effective on a clean surface.
End of Life Tips
If in good condition, showerheads can be donated to organizations like Habitat for Humanity that will reuse them.