Hi, Sunnydays!
Yes, the supply with the Estradot is a bit precarious to say the least! I always have good luck (touch wood) with the very large branches of Boots. Give that a go if you can.😊
I have to say that the 25's are marvellous at sticking - I find that the larger the patch, the more wrinkly it gets (but that makes sense, doesn't it)? My tip is that if you apply to tummy, always lay down to apply it. If it's your bottom, then sitting down to apply helps (it ensures skin is taught, which makes for smoother adhesion).
I always keep my hand over the patch for 5 minutes to help it to settle - I found pressing the edges as others have suggested elsewhere makes the glue 'ooze' more round the edges.
I also have a top tip for removing the black glue gunk - I pop in the shower with a Muslin cloth (the type you get with Liz Earle Cleanse & Polish) and miraculously it just lifts off with just this wet cloth with no fierce scrubbing! No idea why this works and a flannel doesn't, apart from the muslin cloth is a gentle exfoliator.
I'm not sure why your patch went to a little walk......hmmmm! Thats a weird one, isn't it?