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A cool blast of dry ice pellets and compressed air cleanly explodes dirt and grime from a rose-engraved downtown brick.

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Dry ice blasting possible solution for downtown clean-up

A demonstration Wednesday showed one possible solution to the gum and grime that mar downtown sidewalks.

WALLA WALLA -- Gum be gone.City and downtown officials got a look at a possible new way to get rid of old chewing gum, grime and other gunk Wednesday.In front of a small group of onlookers gathered at Land Title Plaza, Dave Tolliver of Oxarc demonstrated


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