Some Castor Oil Questions Please??

Hi hope everyone is well! I have just bought 2 liters of castor oil, I wanted to get a bit, as I am going to try to do this every night for a couple of weeks and the small bottles I was getting from my herbalist just were not enough. There are a few things I would like to ask. The castor oil that I have is 99% pure and cold pressed, it has a slight yellow colour to it, it basicly looks exactly like the stuff I was getting from my herbalist and I never questioned that. I am wondering is this ok to use has there has been mention of organic castor oil? Is it best to keep castor oil in the fridge ? ( I hope so cos I have been ) Also is it best to use a clean cloth and new castor oil each time or can you carry on with the old one and for how long? Thanks...Moonie Tweet