Before I got my VR, it had sat for a very long time and had gunk all over it.  Last night I decided to put the windshield back on but first had to clean it.  I took it in the house and put it in the bathtub (the wife was proud of me:whistling:) and thought it would be a easy job.  After some gentle cleaning with mild soap, I still had a film on it.  I am pretty sure it is tree sap.  Is there an easy way of cleaning it that won't damage it.  I've tried dish washing liquid.  I know windex isn't recomended but I tried it on a small area but it didn't help either.  I am able to scrape off with my finger nail so I know it should come off.  Any ideas?  The seat also is covered with what is probably sap, although, it actually looks like tar.