Waqas its good that the above activity worked for you...but I will still disagree and wouldn't recommend it to anybody. Let me tell you briefly how injector cleaning is done professionally. As I told you it can be read on countless sites on the web and almost same amount of videos can be seen on youtube.
Injectors are clogged due to scaling formed by evaporation of petrol drops on the nozzle. The petrol residues are baked by the chamber heat and it becomes very hard to clean.
The injectors are dismounted and put on on a test bench. On the test bench each of them is checked for spray pattern and flow rate. As you may be knowing that a perfect spray pattern and symmetric flow rate is very important for optimum performance of your vehicle. If the injectors are found to be asymmetric and the spray pattern is not as per the specs they are put to clean in a sonicator. Cavitation is the process which has capability to make cleaning in the microscopic cracks, grooves and minute holes.
After the cleaning injectors are put back on the test bench to confirm if the desired results are acquired and whether the injectors are now atomizing fuel in symmetry with each other.
1) Injectors are clogged due to scaling formed by evaporation of petrol drops on the nozzle. The petrol residues are baked by the chamber heat and become very hard. Petrol scales can not be removed with petrol itself.
II) Energizing solenoids of injectors improperly could cause them damage