hi guys and girls 1st time here so hope i explain this ok. i have a hotpoint aquarius washing machine model no. wml520. the wash cycle knob should click when you turn it from 1 cycle to another.for some reason it just spins freely now when you try to turn it to change to different wash cycles.the last wash i did was on no.2 which is whites so everything i wash now has to be washed on no.2 as it just spins as i said.not sure if something has broke off the back off the knob or even how to get into it.any ideas would be greatly appreciated thx.