What can soften the glue that sticks the plastic tube?
If the glue is glued to the plastic pipe, it can only be cut off, but you say the white material, such as raw tape, hand dug, you can dig it down.
General decoration is hot melt method, followed by not glue. If it's glue, it's the PVC solvent. These two are not allowed to be dismantled... There is no good way.... I used to do the decoration when the use of hot melt do, is to use an electric appliance that PVC soft hot, and then he received together, you that to the white, the melting of the PVC tube pressure out of the more. That's not glue.
Put into the water, so that it can prevent the plastic pipe damage, or can make the glue melt at high temperature.General decoration is hot melt method, followed by not glue. If it's glue, it's the PVC solvent. Demolition is not good, usually replaced.
