I never got ballooning, but it is really a nuisance now how can release the ballooning
Any idea how I can release it.

Hi Thelma,

The article explains are few methods, but the most common is "burping" the bag. I would use caution, however, as this could cause output to escape. I would practice over a toilet, and use an in-pouch deodorant if you plan to "burp" your appliance outside of a washroom.

@thelma glenister - are you using a one piece or two piece system?