Wireless Sensor Bar Help please!

[AmgedIsmail]

How can I thank you guys!!!!!
The candles REALLY worked!!!
I can't BELIEVE!!
I can now move the cursor....

But I burnt my finger while I am lighting up the candle with the little cigarette lighter The Fire breath of the other lighten candle was toward my finger and my finger is really hot and pain now.

I am using this candle...
How long (many hours) can it be on?
When should I blow off the fire to prevent any dangerous situation, thanks!