Thanks for the tip Brian, do you have any advice about which kind of solvent to get or how to apply it? I've got an ebike with hydraulic disc brakes right now and could imagine squealing at some point... I've never tried the solvent thing before and don't want to wreck my bike
I'm not such an expert on solvents. I used a high tech non-toxic cleaner/oil/grease remover (M-Pro 7 gun cleaner) but I expect rubbing alcohol or paint thinner would work, next up would be Acetone and if all else failed Laquer thinner, but that stuff is a bit extreme. I just rubbed hard with a rag dampened with the M-Pro 7 and left no residue so the pads wouldn't be affected, I didn't clean or touch the pads.
One tip about my brakes, the stock brakes on the Dash wear more on the outboard than the inboard pad so I took them out and flipped them at 300 miles. I have AVID BB7's coming, $60 on Amazon, said to be the best mechanical brakes available and unlike the stock brakes (Shimano M375) easy to adjust. As noted elsewhere those brakes have no outboard pad adjustment beyond moving the entire caliper around, and the rear inboard pad adjustment ends up facing the motor with no way to get to it.
Also, you list in your review of the E3 Dash that the brakes are hydraulic which they are not.