Thank you for your post.
Our body chemistry and PH balance of our skin is constantly changing over time, when this happens, sometimes a product that may have worked great for us previously, is not working so well, if at all anymore. This is a possibility and is completely normal.
My suggestion would be to try out a different tape adhesive to see if your results are better. Supertape would be one I would recommend if you have not tried it already.
There are many different options for Supertape available here: http://www.hairdirect.com/store/hairpiece-tape.aspx#q=LTM_MzE|0&o=0&p=1&i=20
If you have any further questions, or concerns, please do not hesitate to give us a call. Any of us consultants are more than happy to assist you.
Thank you and have a wonderful day!