no es necesariamente un problema de residuos de cerveza, generalmente el problema con formar espuma es un problema de residuos de jabón o simplemente un vaso no muy limpio.

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Note added at 12 hrs 0 min (2004-08-25 13:49:37 GMT)
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De
http://www.instawares.com/Beer-Clean-Last-Rinse-Sanitizer-Po...
BEER CLEAN® Bar Sink Program is a complete system formulated for total compatibility and optimum performance. Effective with both manual and electric 3-tank systems, BEER CLEAN® glass cleaner, trichloromelamine-based sanitizer and mineral solvent work together to provide thoroughly cleaned beer, wine and other glasses with no odor, aftertaste or residue.

By assuring a thick, creamy head of foam on every beer drawn, BEER CLEAN® can increase yield by as much as 65 glasses or more per half barrel. At $1.50 per glass, operators can increase profits per half barrel by $100 or more!

De http://www.abwholesaler.com/beertender/beertender07.htm

\"Beer Clean\" Glasses
To ensure your glasses are \"beer clean\", a three-sink cleaning system is ideal. Make sure you use cleaners and sanitizers specifically designed for cleaning beer glasses. Use the following procedures to ensure your glassware is properly cleaned.

Empty used glasses into an open drain and rinse with water to remove any remaining beer and foam. This prevents the dilution of your cleaning solution.

Wash the glasses in a sink containing water and a solution of odorless, low-sudsing, nonfat cleaning compound. Use a nylon, three-spindled bristle brush to wash the glasses. A three-spindled brush allows you to clean two glasses at once and clean the outside of the glass. To ensure glasses are clean, thoroughly brush all surfaces, inside and out, including the bottom of the glass.

Rinse the glasses in a sink containing fresh, clean water. Make sure you place the bottom of the glass in the water first. This prevents air pockets from forming inside the glass. Then take the glass out of the sink, bottom first. This \"heel-in, heel-out\" method assures complete rinsing. Rinse the glass in the tank containing sanitizer, using the same \"heel-in, heel-out\" method.

Finally, let the glasses dry upside down on a stainless steel wire rack or deeply corrugated, free-draining plastic surface to allow maximum air flow and complete, odor-free drying.

NOTE:
This procedure covers the Anheuser-Busch recommendation covering glassware and cleaning in retail outlets dispensing our products. This recommended procedure might be preempted by state and/or local laws/regulations, which may require additional equipment/procedures other than those outlined above.