the correct way clean the fuel injector?

Dear cg, Im having sluggishness with my take off and i know it's the fuel injector.So what's the right way to clean it without injector cleaner?Tell what's the way to do it if i was a mechanic .I asked because i don't trust mechanic's because they do extra stuff that you did not tell them to do and charge you extra and you may not even needed it.So i need to know from you is certain thing's neccesary before i let them do any work.And i e-mailed you about the size of the speaker's in a 94 camry yesturday.You didn't answer my question !If you look back at my e-mail the question was can you tell me the size of the front door speaker's!I still don't know so can you please tell me so i can purchase the right size set .Thank You CG. mocha_teddybear@comcast.net  and i'm out!