Patent ID: 8313581

Claim:
A method of cleaning, comprising: propelling a sublimable media through a discharge wand; inserting the wand between coils in a boiler; an operator contacting an inner surface and an outer surface of the coils with the media via media discharged from a distal end of the discharge wand, wherein the media is deflected at the distal end of the wand such that the discharge media exits the wand with a zero angle of discharge from a discharging orifice of the wand but with a non-zero angle of discharge from the wand compared to the direction of travel of the media upstream of the distal end of the discharge wand that is inserted between the coils sufficient to facilitate contact with the inner surface, wherein the inner surface includes bundles of inner coils, and wherein the operator is facing the outer surface; wherein a cross section of the discharge wand is substantially constant from upstream of the angle at the distal end to the discharge orifice; and wherein the media subsequently dissipates or is consumed.