Try Kerosene instead of the diesel
Where I live kerosene isn't common and therefore rather expensive. That would be very different in areas where it is used for things like heating, etc. and therefore much more affordable. But I agree it does clean well. I believe it is a more refined level of diesel fuel so has similar properties but cleaner (hence the better smell). Paint thinner is another similar example; good cleaner with similar properties but more expensive than fuels. A friend of mine can buy thinner in larger quantities at a low cost so he uses it for all his cleaning needs. Most petroleum based products are just different levels of distillation, with other things added.
You also mentioned "Super Cleaner". Is that the one that used to be called "Castrol Super Clean"? If so, I found it to be about equal to "Purple Power", depending on intended use. Both work O.K., and as I noted I use Purple Power, but honestly none of them are really great (however as good as any of the non-solvent/non-petroleum 'degreasers'). Where I shop Purple Power happens to be much less expensive the Super Clean, but than can vary a lot.
I read a article that supposedly tested several degreaser products. They compared them for certain cleaning tasks, environmental concerns, safety for human contact, cost, etc. The winner was "Oil Eater", but it was a old article and did not include some current products. I tried a sample of it and found it to be about equal with the ones mentioned above. But it isn't widely available in my area, and the places that do offer it have rather high mark-up so the cost ends up being considerable.
I found some 'trigger sprayer' bottles at Home Depot that are designed for chemical use (I think it says 'acid safe' on it). They work well for degreasers without breaking down and leaking or not pumping. But a garden sprayer designed for chemicals is a good idea and would require refilling less often...not to mention saving your finger from fatigue.
By the way, these type of degreasers work well in the ultrasound cleaning machine also. Better than regular soaps and safer than solvents (the machines say not to use flammable products in them). If you buy cleaners specifically labeled for the ultrasound machine they are
really expensive.
On the subject of 'cleaning products'. One that has gone from a good working option to absolutely useless is Berryman's Carb Cleaner/Dip. They now have a couple versions and I've tried them all (there are few regulations on such chemicals here, more on that later). None did a thing even after soaking for days. The old version would have dissolved the carb if you left it in that long. This did not soften even the lightest of dirt. Frankly water works better.
Speaking of product availability and regulations. I came from Calif where it is impossible to buy most good chemicals. Now I'm in Nevada where they allow all other states to dump their nuclear and toxic wastes onto the nearby land. So they aren't very strict on what you can buy or how you dispose of it. But things aren't cheap here either.