Poly glue doesn't HAVE to be pre moistened. It uses the moisture in the air to cure. Misting only ACCELARATES the cure process. As long as the glue cured hard, you are in good shape. If the balsa is too thin, misting it can warp it, so keep the misting to thicker balsa and plywood for structural building. This doesn't apply to foam core sheeting, of course. Also, save yourself some money next time and use Elmer's probond. Works just as well, 1/3 less the price.

Good luck.