Yup now if you do it regularly its so easy to keep clean all the time. I do 99% every few days cause I cannot stand dirty glass at all, get better and smoother hit.
I put in a small amount of 99% and swish it around then pour the excess onto some toilet paper and stick that in the bowl followed by emptying the contents of the bong into the bowl while while the tissue in - shake a bit and then rinse everything off. takes me less than 5 minutes.
Once a month I will rinse out with a bit of CLR after the 99% ISO to remove the deposits from tap water, sparkly!