Mix up some PVA glue & water to a 50/50 ratio. Take some plain x2 ply tissues or toiletry paper, kitchen towel type paper then either tear into strips by hand or better still run them through a blender.
Now slowly add the tissue & mix thoroughly as you go. Keep going until all the glue/water is mixed in evenly. Leave to stand anywhere from 15 minutes to a few hours to allow the tissue to soak up the glue/water.
Add more tissue if the tissue pulp is still watery, or more glue/water if too dry & unmanageable. Leave it to stand until the glue/water is all soaked into the tissue. Then use as you wish gently squeezing out any excess glue/water that might have collected into the bottom of the whole mix. Giving it a regular mix during the use will ensure the glue/water stays relatively even throughout the use of the tissue pulp.