The sticky stuff is a brown recluse, obviously! [/joke]
Serious now. It would be great if you had pictures of that sticky stuff, and/or the spider, but do note that some spiders produce multiple types of silk, and they also vary in stickiness. Example from the article:
Note how the silk going on the horizontal and vertical is different.
About the colourful spots: I'm not sure on what I'm going to say, but couldn't they be pollen stuck in the web? I also happen to grow hot peppers, and they sometimes release a lot of pollen.