Which car do you have what model is it ?
How much is its mileage ?
Anyways you can just take the injectors out clean them up or replace them BUT ! Before taking them out you need to be really sure that the problem lies with the injectors. By the way are you ?
Hesitation, stalling, surging, pinging, slight overheating, or lack of power can be caused by caused by not only dirty injectors but because of alot of other reasons too. So...
Check your spark plugs, wires, fuel and air filters, PCV valve, vacuum hoses and fuel pressure.
With your car in park and the emergency brake set, rev your engine to about 2500-3000 rpm. If the rpm remains steady with no surging or decrease in rpm or loss of power, your catalytic converter is probably OK.
Check your transmission kickdown to see if you aren’t mistaking performance problems for transmission problems.
If possible, do a valve leakdown test to see if you have worn out valves or piston rings. (after 200,000 km this becomes more important)
A year ago i took my bro's car to the workshop to clean the injectors - many people told me not to do it - but i did it anyway - Then the car was messed up for like a month - So im just saying only mess with the injectors if you really need to.