Aldi portable generator tricks for starting please.

Dear All,

I've found several posts relating to these but nothing specific to
starting them.

It's the 850W, 2 stroke ones they were selling a couple of months ago.

I've had it going on two occasions and it worked well but have
practically given up trying to start it recently.

It's annoying as I bought it so that I could use power tools in our
garage rather than get the garage wired up to the mains.

I've tried removing the spark plug to let it vent, assuming it had
flooded but aside from that I don't know what else I can be doing
wrong?

The spark plug gap looks ok.

Could it be that the fuel I'm using has gone 'stale' from storage in a
spare fuel can for too long?

I thought I'd ask here first before having the hassle of returning it
to the manufacturer (couldn't return it to the shop as I'd had it too
long apparantly)

Any help would be much appreciated!

Thanks.