I think heat damage?

@danikalodholtz neither the washer nor the dryer were any good for your iPod. The worst part is the washer. Your iPod is most likely water damaged.

For now, I suggest that you stop continuing to try to charge, sync or otherwise use your phone. This potentially can make a bad situation worse. This may further damage your iPod.

The next thing to do is to clean it. Use this guide iPod Nano 7th Generation Logic Board Assembly Replacement - iFixit Repair Guide to remove the logic board etc..

After you removed the board, clean the whole board, connectors and all with +90% isopropyl alcohol. Follow this guide, it was written for an Apple iPhone 3G but all the points are still pertinent to your iPod as well. While you clean your board, check for any obvious damage, like burned or missing components etc. I cannot stress the importance of a good cleaning enough, so do it over and over while replacing the alcohol after each cleaning.

When it is properly cleaned, replace the battery. All these steps are to avoid delayed failure caused by corrosion. Best thing to do would be to clean it with an ultrasonic cleaner, but if you do not have access to one, this will at least help. Once all this is done, reassemble your iPod and reevaluate. Until it is cleaned, everything will only be a guess.

It is possible that you have a bad LCD and replacing the display assembly may fix it. Even with all this, water damage has only a small chance to be fully repaired, but at least you can give it a try.