We found that the water cooled in the tank too fast so after fitting out our guys with roller skates we achieved the necessary speed to empty the tank before it got cold (and also the sq footage many claim here)
roro
Pre vac.
Pre spray spots and TAs with a 32oz sprayer filled with DS2 mixed extra strong, possibly some 40 vol and possibly some ammonia if gunky. No more than 200 af ahead of myself then two wet and one or two dry passes.
Follow up with a 175 and absorbent pads if gunky.