I will say that in my area of the country, nothing cleans film as well as an alkaline presoak that is "boosted" by an alkaline builder. This has to be mixed at the point of dilution. You use two different containers, as the mixture is too strong to stay is solution as a one bucket product. I use hydrominders and dual tip eductors.
Blendco is very good at that system but as mentioned can be pricey. If you don't want to educate yourself and spend time learning then a Blendco distributor has the tools to clean. Quest, Warsaw, and Qualchem can also boost. I'm sure there are others. I can homebrew with bulk industrial chemicals for cheap but many people aren't willing to do that.