According to info on the web PVA's are susceptible to cold and also warm, soapy water. So stick it in the freezer then give it a good wash as hot as can be recommended by label.
PVA is a water based glue so it should wash straight out, like TIM BAXTER says. When my kids have had some on dark clothing I have noticed that on subsequent washes the mark is still slightly visible when the clothing is wet, but it cannot be seen once the clothing is dry.