"AU BAIN MARIE"...............
Had to look this up on google, very useful, but at the same time was a little disappointed with the images presented haha
Tried the water bath idea and managed to get the solution inside the glass vessel to 50 degrees C. I'm sure with a little more time it will reach 60 degrees! Took over 3 hours to reach that temperature, we must have the slowest heating bath in history! However, I guess slow heating will reduce the risk of the glass cracking!
Thanks again all !!