Want estimate to clean fuel injectors? Dealer wants $575. Best place to go?

Thanks and I agree Techron and other gas additives help so that's all I use since day one. I should have been more clear...I need intake valves cleaned as I'm 99% sure I already have carbon buildup . I am told my 2013 Mini R55 has a direct injection engine and prone to carbon build up on intake valves because fuel doesn't spray directly onto valves. I am thinking of getting it done professionally but also considering doing myself using CRC Intake Valve cleaner by spraying into air intake after removing air filter and see how it goes. I do prefer having a respectable mechanic or shop in Honolulu that could do for much less than $575.....I guess cost of repair depends on time and difficulty removing carbon deposits.

Unless it can be cleaned by using a cleaner or additive, engine disassembly is required! .. Another good (proven) product is SeaFoam motor tune.