i have a speed clean pressure washer ,but i don't have the manuel,and i was hoping you can tell me how to work the soap spray on it,i have one nozzle with it but don't know if i need a different one for the soap,the nozzle i have is yellow.please let me know ,if i need a different nozzle and how much the price for it,e-mail to donnaandlindsey@live.ca thank-you