Me too!
I try very hard not to use sarong for my ger, but end up i give in cos when she was bb, she having fever, she want to be carry, this cause her fever keep on went up, end up i let my parent to install the sarong. After she recover, I try not to let her sleep in the sarong too often. So till now occassionally, she still sleep in sarong specially when she is super cranky, 想睡又不舍得睡.
I think as long as we don shake too hard, it wouldn't be a problem, I always use little strength to shake.