I would fill the black tank to 2/3-3/4 full, add a capful of Calgon, a capful of Purex, maybe your black tank deodorizer of choice, and a bag of ice and drive it down the road. Dump again and I'd bet you'll be good to go. Good luck!
2015 XLR Hyperlite 30HFS5 (mods being performed regularly)
2009 Salem LA 292fkds (gone)
Nights- ('12)23 ('13)23 ('14)15 ('15)31 ('16)25
2014 Harley Davidson FLHX (XLR cargo)
2014 VW Jetta TDI (diesel sipper, camping support vehicle)
2011 Ram 2500 CC 4X4 CTD, B&W Companion (toy hauler hauler)