Any tips of getting the space depositor oodles flat? I used a few bags for my winter clothing and once i...

I used a few bags for my winter clothing and once i took the air out the sack was lumpy, so I'm not sure if it saves space or not. Any thinking of how to get the bags flat would be greatly appreciated
How to gun down bedbugs?
Answers:    Use a vacuum to suck the heavens out. If it's still lumpy, get a cushion big enough to cover the pack. Sit on the cushion with the bag lower than and either vacuum out or sit until the bag is flat.