Roll up some tarps or other water absorbent material along the wall base, get buckets of hot water- as hot as you can safely stand- and some TSP or glue remover from Sherwin Williams. Start washing, it might take a while you have to get all of it off prior to priming. When you feel the wall you will feel a slick like substance, that is glue. Keep going till you do not feel that. Best of luck.

First block sand using a coarse grade paper… then prime with ONLY Pigmented Shellac Sealer Primer… washing beforehand is a wasted effort and does no good…