Butter very soft even on a low/cold temperature setting?
After a period of time dust may build up around the heatsink which is situated internally under the fan area. As the fan is continually drawing in air, it is also bringing in dust particles. This could affect the thermostatic effectiveness and the dish may warm up enough to make the butter very soft even at the coolest setting.
To simply remedy this, switch off and unplug the main unit. On either side of the unit are two vents. By blowing down the vents you will notice dust will blow out of the fan area, do this a couple of times and then we suggest using a vacuum with the brush attachment to gently brush over the fan area.
This should be carried out at least every 3 months to ensure optimum performance, reduce power consumption and prevent the unit being overworked. Failure to do this could result in your Charge Plug being permanently damaged and cutting out.