Sounds like you need to give your interior a good drying out to see if it helps. Heaters on, windows down a crack to let the vapour out the car instead of just moving about the inside and getting worse.
If you use a spray can deicer you get cold hands or a soggy finger tip anyway.
Car on, heated windows on, walk away and have breakfast *If you have a driveway* come back 5-10mins toasty inside and car is ready to have its nuts revved off.
What's wrong with using a scraper?
Park it really close to the wall, don't get ice on the screen unless it's properly arctic. It's frequently frozen in the car park after work though, in which case spray some de-icer on it and drive off a few seconds later.