Hi sam6, welcome to the forum! Unfortunately the hazing you see typically won’t wash off. You may be able to polish it off with acrylic polish/cleaner or by heating (annealing) the acrylic, but it can be really tough to get rid of. The good news is it can be avoided for the most part, you just have to dial in your settings. Was the acrylic masked when you cut it and did you use proofgrade settings?
This is a good discussion about cleaning acrylic with some info how to get the cleanest cut.