don't use gloves or poles= problem solved.
but for real, grabs are tricky even without bulky equipment. it may help getting slimmer gear, but it may also be that you just haven't practiced enough. it definitely is easier to grab with gloves though. with mittens you can't do 2 finger grabs while holding your poles in the other 2 fingers.
please don't take my initial advice of grabs without gloves unless you want to cut off your fingers. trust me. it sucks.