Sharp SF-2116 Analog Copier . The red Service Man sign is on

Emptying the waste toner won't turn the service light off,
you require simulation codes to enter into the machine and actually reset the service man itself.

to enter into this you need to do a series of commands which are
"Start(unsure if you actually need to press start) Clear, Interrupt, Zero, Interrupt"

Then all the lamps and idicators on the operation panel go off then you will need to type in "20" and hit start which will reset the maintenance counter.

Try cleaning the bottle out with soapy water.