I read on the side view forums that you could use Windex Multi Task Cleaner with vinegar to safely clean the screen of the 898. I found some at Kroger for $3 and got a micro-fiber cloth for like $2. I always get some kind of spray drops on my screen everytime I am out and I don't want them to hurt the screen coating.

What products can be used to clean my screen/display on my HB unit?

Also, you can get a screen protector here:

NuShield screen protectors provide long-lasting protection for your Humminbird display

Just some more info that you might be interested in...

DoubleG