I believe you.
I used to spot-heat with kerosene 10-15 years ago. Then they introduced low-sulfur kerosene & diesel - basically, the low-sulfur kerosene causes the cotton space heater wicks to attract moisture and clog up quickly, necessitating a replacement, while your space heater stutters and fumes until you replace it @ $15 a pop.
Had to quit using it.
Eventually, I ran across a document showing that one of the low-sulfur ingredients is "bio-diesel", at a required 7% of the mix.
"Bio-diesel" - french fry oil, animal oils, etc., etc. If the 7% varies higher, not only do you have the bio-cr@p in your fuel, it's doing other stuff to your machinery, in your case.
Folks still heat with kerosene across the country, space heaters, chinee/walmart wick heaters that copy the Perfection 1890s and onward models that Standard Oil ended up owning... to sell kerosene.
“green” diesel— while it was the original design of Otto Diesel (his engines would burn peanut oil- and one can “tune up” a diesel to run on used cooking oil— side effect of being constantly hungry for french fries, LOL) has to have all sorts of petrochemical additives to maintain the efficiency/lubricity of the fuel to work in the injectors, and to not soot up the engines/exhaust. So— it doesn’t work— but... somebody got a huge Navy contract for the “green” Navy, that compromised combat readiness, for certain.
Sending PM with other info you might be interested in.