burn through oils like crazy [SEP] This was bought as a replacement to a 300mL diffuser, also by InnoGear.<br /><br />On the first use, it was great.  But upon the subsequent use, it got worst.  As in the amount of steam decreases.  And yes, it was properly cleaned between usage.<br /><br />The automatic cutoff does work, but it got worst on more usage.  On the first use, almost all the water was gone before it shut down.  Afterward, the amount of water that remains is a whole lot more, about 1/5 of the water tank.<br /><br />Previously, with the 300mL, the whole tank could last for up to 8 hrs.  With this 150mL, it last for about 1.5 hrs.  The burn rate is way too high.