I did being warm and hydrated helps. I tend to do it as soon as I waken up then I'm toasty warm. I stand up too.
Perhaps you aren't pressing firmly enough on the lancet. I put it in place, press firmly on it and shut my eyes.
Don't 'squeeze' your finger t try to get the blood out - that doesn't work. You could try 'milking' your finger by rubbing the thumb or finger of your other hand fairly firmly up towards where you have made the 'hole' that might work.
I'm testing my blood sugar before and after each meal at the moment and through trial and error I've discovered some fingers are better than others - first finger and ring finger for me. I've also discovered that going to the side of these fingers in from and level with or slightly below the base of the nail rather than right in the middle of the pad helps but I've had months of stabbing my finger at least six times a day to experiment.
I'd say - be warm, hydrated, stand up, position the lancet, hold it really firmly against your finger, close your eyes and press it hard. Then you too could be like me and end up not only filling your test tube in no time at all but having such a good 'flow' that you. drip blood all over the place as well.
I'm sure BH will get you sorted out when y phone them today.