First rule, NEVER BE SORRY! This forum was built for corn owners to ask questions, as silly as you think they are, but there are no stupid questions, just stupid owners who don't bother to ask before they do something that may harm your snake.
RULES FOR CLEANING VIV
-remove snake, and yes, if it is time to feed put her in a separate larger container and feed.
-remove the decorations and wash them well with a little vinegar and hot water.
-empty substrate. Many snakes will do their business on the floor under the substrate, so you may have some "crusty" stuff to scrape off with a knife. After that, spray your cleaning fluid (vinegar or bleach mix) especially on the dirty spots and let them soak.
-clean the outside of the viv, inspect your lid for possible holes or bent wires
-go back in and use a heavy duty scrub brush (used ONLY for the snake cage and decorations) and clean all the spots away.
-rinse very well with clean water, dry, add clean substrate and the plants/rocks/hides in the cage and let her go!
I also have some large, round stones (6x6") that were in our landscape, I picked some of the prettier ones, boiled them for about an hour with a bit of bleach then let them dry. They make the viv more natural.
For a backdrop, there are several eBay sellers that you can buy a pre-printed backdrop for your viv. I installed mine today and it looks great!
Good luck!