oven knocks the electric off?

Hi,i have a beko sc1521w electric cooker,the problem is after cleaning the oven out today with some oven cleaner,every time i turn the oven on it knocks all the house electrics off,the cooker itself works ok i can still use the rings but when i turn the oven knob the power is knocked off at the trip switch,ive removed the back of the cooker a made sure nothing was wet and everything seems ok,is it time for a new cooker as this one is about three years old,any advice would be great...thank you..