1) Weight the amount of PVA and take it to beaker, measure the water amount and start the heating process (90 °C) under stirring until dissolved all PVA.
You also can prepare this solution by employing hot water, but in any case you have to stir the system.
Edwin , thanks a lot , i actually heated the water to 90 then i start adding the PVA slowly with continuous stirring but the bottom of the beaker start to be burned and the magnet refuse to stir anymore