First, welcome!
As this is an Adam's forum, we will focus on what products of ours could help. It's possible the plastic is simply dry and the streaks are the dry vs. not so dry areas. My recommendation is to try and start over, stripping down the previous products. Use something like All Purpose Interior Cleaning Gel or Leather and Interior Cleaner, then top with Interior Detailer or even Leather Conditioner to rehydrate and protect.
Also, pics could help so please post some, if available.