[Wannabe]

The cups keep burping the suction out and if I do manage to keep them on it kinda hurts close to my armpits.

I find it helps a lot if I massage them with lotion awhile before noogling. Also, I keep a spray bottle of clean water handy and sometimes use it moisten my skin before putting the cups on my chest. This helps create a good seal.

If you're experiencing soreness, you're probably suctioning too hard. Don't overdo it.