186. What would be the most practical and efficient way of removing soot deposits from the fire-sides of the tubes of an auxiliary water-tube natural-circulation boiler as fitted on your platform supply vessel?

Fireside soot is best removed with an air lance, which efficiently dislodges loose deposits without wetting the boiler or risking damage. High-pressure water jets and wire brushes pose risks of damage and corrosion, while acid cleaning is inappropriate for fireside soot.