Do you start with the kernels in as it heats? I find one or two kernels to wait for the popping, the add the rest. I start on highest… Then wait until it starts popping again then reduce to lowest heat to finish. Works well. Also making sure to not add seasonings that burn easily to the popper. I’ve had flop batches using store seasonings… Especially bad when they had sugar in it without me checking. Not every seasoning can be whirled pop safe. Always needs a salt base, sugar is a sure fail… Herbs a sure fail… Other than that the high to low worked with any oil I have used.

Avocado oil has a high smoke point. I use an air popper then drizzle 1/2-butter & coconut oil with a spice mix & sprinkle with grated parmesen cheese.