Read the instructions before using as there may be some aspects of the device that an inexperienced user (like myself)  are worth noting.  Most notably, when refilling the water tank keep the steam release trigger pressed open to release the tank's pressure, or the built-up pressure in the tank will substantially impede the refilling of the tank.  The result can be underfilling the tank.  Also note that if the tank needs refilling, turn off the power and let it cool 20-30 minutes.  When you first  turn on the steamer when the indicator light turns green, your initial discharge will likely have some hot water in it.  But in less than a minute you get steam only as the conduit heats up. This machine has cleaned previously uncleanable tile floors and has 99% eradicated my bedbug problem.  I am optimistic that repeated treatments will get the last 1%. Finally something that kills their eggs.  An excellent purchase.