Hey KP3! Thanks for the feedback! Good news: there are a lot of options. If the glue is balling up or getting gross and slimy then your best bet is to strip that layer of glue off and expose a new one. You can do this by taking a sturdy paper grocery bag (not a thin one like a brown paper lunch sack though, those will tear) and ironing it on to the glue until you start to see a bit of moisture seep through. Then just peel it off and it'll "refresh" the glue by exposing a new layer. If the glue is actually coming off or it's getting thin then I'd touch it up in the bald spots with new glue or, depending on how bad it is, just reglue the whole dang thing. The Dynafit skins are made by Pomoca and the Pomoca Skin Glue can be found in here
under "Adhesive Tube." You can use a credit card or something similar to evenly apply the layer of glue.