[mrs bouquet]

Some things I buy come in this wonderful invention    ie:   Cheese, Dried fruit and those sort of things.
I cannot get the bags to seal for me, and I don't know anybody else who can make them work.  All mine are sealed with clothes pegs.        What is the secret, please tell us.   (Mind you, I wish it had been my invention).  I bet he/she is now very rich.     Mrs Bouquet

[JayG]

Start right at either end, not the middle - you need to feel the two sides click together before hopefully being able to zip it all the way across.

Doesn't always work though - bags of frozen peas seem the worst: the first time I open the bag the seal usually detaches itself from the bag so out come the plastic clothes pegs (now they are a great invention for the kitchen, garden and greenhouse!  )

[Lardman]

I cannot get the bags to seal for me, and I don't know anybody else who can make them work.  All mine are sealed with clothes pegs.        What is the secret, please tell us. 

The zip lock ones I get they work, these tab things like tape - waste of space.

plastic clothes pegs (now they are a great invention for the kitchen, garden and greenhouse!  )

You're not wrong, I've bought so many packets of pegs and none of them end up in the peg beg far too useful !