I've recently accepted a short-term contract position as basically an electronics technician / solder monkey and we're using rosin-core silver/tin/copper solder for our boards for RoHS compliance. Up to this point, I've only done low-volume production where it's been more or less acceptable to finish off flux removal (after soaking / brushing) by hosing down boards with enough flux remover (MG Chemicals Flux Remover) or Superclean to ensure that no residue or re-deposit is left behind. However, now that I'm expected to produce in moderate volume (dozens of boards) I'm wondering if there's an alternative to going through cans of this stuff, or if that's just the cost of production? Should we just be changing the primary flux remover wash more often to dissolve the amount of dissolved Rosin? Should we switch over to a water-soluble rosin, and just put boards through the dish washer? A no-clean formulation, and just leave be? Some of the best results I've achieved thus far have been to immediately taking the boards from the wash / scrub pan, and washing the whole thing under water (thankfully, no cardboard speakers or transformers), and then using the air compressor to clean off the water. However, I'm a little leary of leaving moisture under components / inside connectors, and was pretty paranoid about drying off the boards. That all said, I was wondering if anybody had any suggestions for effective low-mid volume defluxing of boards?