Quote Originally Posted by mek42 View Post
In case anyone reads this thread to make a purchase decision, we put in the DuPont brand with the built-in underlay and there is no streaking.

Do you have any scraps of the laminate you can play with various solvent systems to make sure the laminate won't get damaged? If so, if you have some sort of water-insoluble organic stuff as the problem, you might try acetone or hexanes. Both of these are very stinky and you don't want to breath in the fumes while using them in quantity. The good news is they're also very volatile, so leaving the house with windows open for a few hours after cleaning should allow the fumes to go away.

This probably isn't a practical answer, but I am a chemist and classes start next week, so I'm thinking chemically again.
Funny when we had the other floor that was replaced, the tech from Betrry used acetone. It was still streaky. That's probably why they decided to replace it. Same deal with this style (It's still Berry but a narrower plank and lighter color). I'm guessing it's just the way this floor is. Never again! I'll check out the DuPont floor for future reference. Thanks to all who responded.