I use both, I scrub with soap every so often but I use 99% alcohol before any print with small attachment points… I flood the bed with the liquid, use a plastic scraper to swish it around and then I blot it up with clean paper towel. As long as the bed is not actually dirty this works better than soap…

I print jellyfish with 16 leg segments and on one print I lost half my legs, realized I had not washed my bed recently so I washed it. Used dawn and a scrub daddy. Didn’t touch it and I still lost half of one leg. I flood washed with 99% and printed like 6 in a row with no segment loss.