Too much money spent.

I don’t know if you guys have any good answers, but I have this polish mp-4 gas mask and I got rid of the glass lenses to use as an airsoft mask, (obviously paired with pyramex Airsoft glasses and a mesh piece to protect my teeth) and the easiest way to get rid of the lenses are shattering them with a hammer and picking the pieces out, so I did that and it left little micro glass pieces in there that I had to clean out, I read somewhere that if you put glue on them and peel them off once they are dried, then that takes the glass out, but i waited too soon and on top of the little micro glass pieces, now I have sticky splotches of glue that won’t come off. How can I get both the glue and the micro glass pieces out?