This build up will come off very easily after a quick soak in nearly any weak acid solution -- white vinegar and water will let you quickly wipe the reside off with a sponge after a short soak. A quick hit with the bottle brush or a pressurized bottle rinser will take care of the inside.
Fermenting: American Stout
Kegged: Biere de Garde, Premium American Lager, "May Day" Belgian Pale Ale, "Witty Retort" Light RyePA, "Spring Break" Marzen
Bottled: "Sh!tshow" Schwarzbier, Maibock, Saison, Kolsch