Yep bed height is important. Bed cleaning on mine is a hot wash with detergent and sponge (never scrape). Rinse well. Pure IPA as 70% has stuff that will make it not stick well at all. Most 70% has smelly oils and other such crap if it is Chemist sourced. So 99-100% only.
Run a 10mm Brim on the feet and 5C higher for the first 1-3 layers if your slicer allows helps the initial stick.
If pure IPA is hard to find, look at the hardware store for methyl hydrate. It is usually 99.9% pure; it is used as fuel and gasoline drier in the winter. Works very well, but it will dry out your skin and make it crack very quickly; even my tough old dragon hide. If you get a lot on you, wash it off immediately and grab the hand cream afterwards.
Always use on fresh folded paper towel; the lint from paper towels usually just blows away, while it really is hard to know just how clean/oil-free a cloth really is. I prefer commercial brown unbleached paper towel roll, as it is slightly rougher and you know it doesn't have anything but wood pulp in it.
Bed leveling is as much art as science; I use a folded-over Post-It for initial leveling; the original kind that's a little thicker. Preheat bed to 50-60°, nozzle 120°-ish. Hold Post-It by the folded-over part, but single layer under the nozzle; bring the bed up til you can feel it drag, but can still push the paper front/back. Check at approx 30mm from each corner, the at bed center as a reality check.
Once you have it that close, it's usually just a matter of tweaking a fraction of a turn on each knob as the brim goes down on each print, and you're golden.
mnem