It's recommended that you clean your fuel injectors or have the fuel injectors inspected and cleaned every 45,000 to 50,000 miles or once every 3 years which is 36 months.
I take my vehicle into the shop and have them do a good cleaning of the fuel injectors and they clean them up really good.
My vehicle runs a lot better after I have the shop clean the fuel injectors.
It only costs me $80.00 every 3 years to get the fuel injectors professionally cleaned so it's not worth it to me to do it myself.