I think you have answered your own question here.......go over your technique and see where the problem is, is it your file prep, are you a bit eager and heavy handed with the file, are you using a 240 grit only once going in direction of nail growth ???? Using light pressure almost non existing, you are just removing shine not keratin....
What about your blending technique, are you blending just the tip or does your file touch the natural nail ?? As the nail grows, the nail damage is growing out with it, hence the flimsy free edge when you remove the enhancement to apply a new set. Then you blend again and the same happens..... Its like roof tiling nail damage, the nail damage being the slates , if you can see where I am coming from....
So look at your application techniques ..... try this............ paint your natural nail red.... apply a tip, now blend it how you usually blend it..... how much of the red enamel is coming off on your file ????? Imagine then red enamel is the keratin....... the more red on your file, the less keratin on the nail...........
Then try it again, try not to touch the enamel at all with your file !!!!!
Not as easy as you might think, but once you have cracked it it's goodbye to flimsy nails and hello to great blending skills !!!!
Have a go !!!!
