S1 Vivaldi II Owner’s ManualPage 218 Adjustments and Maintenance8.1 External VII Surface CleaningUse a damp sponge and wipe dry with a soft cloth. Alternately, window cleaner wipedoff with a dry soft cloth works well.8.2 Routine Group CleaningThe extra pair of shower screens was not included with your VII so you'd have an extraset. They are included as part of LaSpaziale’s recommended cleaning regimen which istargeted at light commercial use where there is no time for a complete detergent basedback flush routine. The reason for LaSpaziale’s double shower screen arrangement isto trap grounds between the screens so that the 3-way valve rarely, if ever, needs adetergent cleaning. With the VII on and fully heated, use the included key wrench to remove theshower screen bolt. Drop out the two screens and the dispersion disk. Use the included plastic handled wire brush to quickly scrub the group headwhile water is running through the group to flush out the particles. (This is whythe long handled brush - to keep your hands away from hot water.) Also, give the dispersion disk a quick scrub. Reassemble using the other set of screens. Soak the original set of screens in Cafiza, Joe Glo, or similar detergent, scrub,rinse, and put away for next time.The Way Most V2 Users Actually Do It:As noted above the official LaSpaziale method was developed assuming the machine isin light commercial use. Here is how most users clean their coffee group:Start with the basic procedure above, though most folks use something like aPallo brush rather than the wire brush that came with the machine for the 3rdstep. Once the clean screens and dispersion disk are back in the machineperform the following steps.Using 1/3 tsp Cafiza, Joe Glo, or similar detergent every 2-4 weeks is plentyfor home use. Backflush the S1 Vivaldi II more often with plain water.Place the backflush disk in the double basket with 1/3 tsp of Cafiza powder.Press the single cup button. In 5-10 seconds the three yellow LEDs will startto blink.Press the single cup button again to stop the pump which automaticallyengages the 3-way valve. (The three yellow LEDs normally come on when