What is Reddit's opinion of AMTECH NC-559-V2-TF Solder Flux - 30cc Dispensing Kit Including Plunger and Tip?

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I went with the Crest and it is great, but it's also my only data point for cleaners. I suppose anything will seem great coming from just using a brush/alcohol/compressed air. It cleans my preferred flux off no problem for me; however, I find it seems to struggle a bit with corrosion.

Have you found that the solution ratio/temp/times need to be a bit different for this cleaner compared to others or do you think maybe it has more to do with the actual construction and performance of the device? For the cost of the damn thing I can't help but assume it's how I'm using it.

Here's the Amazon link. It's not the EXACT one I got, the one I got is currently unavailable but this one should be good. Tube pictured has the same sticker as what I got.

Here's the eBay listing. This one seems good too. If that doesn't work, the item number is 252340246160.