@tracyjg I am sorry you haven't been provided help, you might want to compile everything about your problem with as much detail as possible in to a single post and make a thread either in the hatching forums or a separate one in the duck forums. I don't know about the rest of the posters here but a lot of us seem new and inexperienced with ducks, or at the very least we're unfamiliar with outdoor duck keeping, frequent incubation, etc. I'm sorry you're having so much trouble!
90 is too cold so you might as well not even set in that one unless you can rig it up to get warmer, and 188 is.. that's got to be a typo, right? You'd have cooked eggs and beyond at that temp! 99.5 is ideal for duck incubation I believe. I've not incubated duck eggs before but I'd think that's too much humidity too, if you are setting fresh eggs? That is about all I have to offer. Sorry to not be of more help!