Inexpensive tweak

Just got back from a business trip to find that our cat had thrown up on my Audible Illusions preamp (unfortunately vented on top). Everything was dried up. Haven't looked inside yet. Not sure how to clean a circuit board. But I've noticed that my system is more revealing than before. I won't share details of exactly where on the preamp my cat got sick because I might want to try to market this tweak sometime in the future. :-)