Hi there,
I've been taught a couple of ways to get those pesky lower lashes out of the way when you do eyelash extensions.
You can tape them down with medical paper tape, this is ok but it looks very painful when you remove it from the clients lashes eventhough they say it isn't.
There are the paper eyepads, I've never used these myself so I can not make an opinion about them.
And then there's the sticky gel looking eyepads you saw on Youtube, these are normally called Q10 collagen eyetreatments or antiwrinkle eyepads. They are a good way for your client to get an eye treatment and an add-on to your eyelash extension service.
My supplier charges me approx $3(Aus) each and recommends I charge my client $10(Aus).
I like them because they are quick and easy to use, you can add them into the price of your treatment and have it as a unique service you do.
I'm not sure why your gel eyepads don't stick because I would have thought the moisture of the gel would cause a vacuum on the skin and cause them to stay put.
If you are anything like me I always forget to turn a corner over on the medical tape and the next time I go to use it, it takes me forever to find the end of the tape :o
I hope this helped