Insert a Grime-Encrusted Item into the Sparklematic 5200, and be sure to have three silver coins to start the machine.
This contraption stands out amongst the gnomes holding out against the madness outside the room. A small plaque on the device reads "The Sparklematic 5200", followed by some text:
"Grime and residue ruining your sparklies? The Sparklematic 5200 puts the shine back in shine-tastic! Insert the item you wish to clean and deposit three silver coins in the coin slot. Give the Sparklematic 5200 a moment for operation, and voila! Your valuables will emerge clean and shiny!"