I don't deal with automotive AC other than my own vehicles, but have been doing ac work on ag equipment(tractors, combines, skid steers, etc) for 15+ years. What are your procedures after the failure? just replacing the compressor, accumulator, and orifice tube? you really have to flush the lines, evaporator, and condenser at minimum, both ways because sometimes metal will get stuck in nooks and crannies in the hoses and fittings. Depending on the style of evaporator and condenser, there is no cleaning them, only replacement because you'll never get everything out, and 30 seconds or 30 hours, it'll take a compressor out again. Even new hoses, condensers, and evaporators SHOULD be flushed, because sometimes there will be junk inside of them from being manufactured, or stored improperly. I normally use mineral spirits to start flushing, and once I don't get any more metal or debris out, then I do a flush with an actual solvent based AC flush because the mineral spirits will leave a residue on the inside of everything that can break down the refrigerant oil of your choice...