Hello Keith. Not a silly question and I have discussed it since. It's simply a case of winding the wick down into the housing until it extinguishes. If it still flickers you can blow it out. Hope this answers your questions. AJ

Hi Molly. Yes it is a glass greenhouse. But I also line it with bubble wrap for extra warmth. Thanks for asking, AJ

Hi Jason. That sounds like either an issue with the wick or the fuel. You don't say if your heater is new or not. I would make sure that the wick is cleaned and wound right down into the burner. Raise it to light it and then wind it right down until you have a small steady orange /yellow flame with no smoke or rapid flickering. Place the flu/chimney on top, give it a minute or two to settle and then readjust the flame if necessary. With these types of heaters "less is more" is the phrase to remember. Also make sure that you are using the recommended fuel.... Paraffin or Kerosene. Good luck cleaning up bud. It's frustrating I know as I did it myself. AJ

@@TheLifesGood thanks for the reply, the heater is second hand and didnt contain any old fuel, i bought 2 tubs of paraffin from B&Q, and just put 2 new wicks in it as its a double burner, ill try again but it does flicker then go out, very frustrating and time consuming, this is our first greenhouse so trial and error!

@@jasonmiles5043 in that case you may not have let the wicks soak long enough before lighting. Also check for draughts. It's surprising how low you set the wicks after they have been lit.