Hi Waldo..... I had a look [Googled] the glue you mentioned.....seems like a pretty strong one so my guess is you`re not applying enough coats [ without reading the instructions I`m taking a guess] but most glues need to be applied THINLY [ vital!! ] and allowed to `cure`properly time-wise, before applying the next coat. It`s a common thing for newbies to either literally trowel it on, and then press the lace down onto the still-wet glue, leading to it going through the lace and coating the bottom of the hair shafts and then drying into clumps---a big `No-No`! --- or otherwise, not applying sufficient to provide a proper hold...it`s a balancing act and one I`m sure you`ll perfect in time. The glues are basically 2 types.... water-based or acrylic, and depending on your body physiology, one type may work better than another for you..... when you have done a `proper`bond, moisture from showering etc. should not cause problems in the early days of your bond......certainly after a week [ at the very least] the bond may begin to weaken [again depending on how the glue is reacting to your body/lifestyle etc] Have you tried using a combination of a strong tape inside your perimeter and a good glue at the very edge? Many people who work out find a combination of the two gives a better hold.... you`re on the learning curve right now which we all go through.....try one of the acrylic glues as an alternative but the one you have seems good...try adding 3 layers/coats and see if that helps before spending more money on more products.... it`s quite possible that you`re not applying sufficient..... but it`s VITAL to apply your coats evenly and thinly allowing sufficient time for each layer to practically go dry..they should be almost dry before applying the next layer....this will give a good foundation for the lace to bed into and you will then have very few issues....hope that helps... Paul.