I have a Simpson Riviera Dishwasher which I have had for years & being an older couple only use it when we have visitors so over the years the knob which starts the machine letters have faded & I can't read where No 3 the normal wash is so could u tell me where it is situated on the knob. This probably seems like a silly question to u but do hope u can help me. Thankyou. Barb King