Can expired contact lens solution still be used for making slime? if anyone knows, pls do answer?

I have never made slime, but I suspect that is a rather expensive recipe you have there. The expiration date has nothing to do with it. That is required by federal law, but it doesn't have to have any particular meaning. Here is a link to 19 recipes for slime. You should bear in mind that borax is not good if little kids will play with the slime because it makes them sick.
chemistry.about.com/od/letsmakeslime/tp/slimerecipes.htm