The Juki is set into the SewEzi table. The slider makes it hard to change the bobbin on the Juki. I had a Brother 1500 with the same type of problem, but fixed it by removing the bobbin cover door which is easily done on the Brother. Not so on the Juki with the way the door is hinged.
I have cats, can't control the cat hair as the cats are more important, and the sliders need to be taped down or frequently washed to stick. Taping them down makes a bobbin change worse.
If you have a bobbin top loader, you probably also have to move the slider. Front loading machines like my Pfaff 2170 are no problem.
As for using silicone spray - spray it onto a clean cloth, then rub it on table. No residue flying around to get into machine.