I’ve found that eco friendly dish soap here in UK such as “ECOver” doesn’t do the job, it has to be proper things like Fairy… otherwise my first layers are normally awful. 99% isoprop in between fairy cleans is my typical regimen and since then I’ve been struggling to get some prints off!
I should add that I only need to do “proper” cleans when i’ve been doing lots of PETG printing and suddenly want to switch back to PLA.