Hi, does any one know any problems with these, the fan blows hot air out the front when you are cooking, making standing in front of it unbearable, if you turn off the power to the fan then the buttons on the front blister and the silver coating on them melts ( ive replaced them once already ) is the fan wired up wrong ? should it suck hot air in and away from you , or is it badly designed , its not a cheap cooker,any comments on this one, thanks.