Ironically I used a toothbrush on them. Dipped it in a little water, shook it out so it was just damp, then slowly/gently scrubbed over the area. I'm hopeful in another month or so the fading of the whiskers will be progressed enough to direct most of the attention away from the spot.
I got toothpaste on my indigo/indigo slubs. Not sure what to do. Spilled beer all over my regular indigo's last weekend which forced a wash after 9 months (turned out fine but I was sweating it/disappointed I had to wash early), I really hope I haven't ruined these in the same week.
Any input welcome.