I’ve found that the settings suggested by the dialog box that pops up when you select Support W to be a bit tight.
At the pop up that says “When using support material for the support interface, We recommend the following settings: 0 top z distance, 0 interface spacing, concentric pattern and disable independent support layer height”
I click yes but then edit the top z distance and interface spacing to something other than 0. I’m pretty sure the default of 0.2 has worked fine for me. I think they are trying to get the best possible surface by giving full support but if you can’t remove the support, what’s the point of a perfect surface?