Water heater blanket

I was surprised to notice when I went into the basement this morning that my water heater does not have an insulated blanket over it!  Seems to me that I put one on it a couple of years ago.  Last year I had some maintenance work done on my furnace and water heater; I have a contract with my propane company to do an annual check up.  I think that the maintenance man might have removed the water heater blanket when he was checking out the water heater.  I wonder why he didn’t put it back on; maybe he ruined it when he removed it.  He should have at least told me about it!  I am guessing he didn’t tell me about it because he was afraid he would have to pay out of pocket to replace it.  Oh well, regardless, I am going to have to go buy a new one this week!