How catch the ghost?

U have to buy an item that has the ghost mark in the right bottom corner like the haunted paintings, black dresser, a capture device with chains and cuffs that hangs on the wall, bookshelf in the shape of a coffin, and many others. Then you place the haunted item in a Sims home, then tap on it to have them search for ghosts. And when your Sim is done searching for ghosts a bubble will appear above their head, you tap the bubble and a ghost is released out of the ghost hunting gun, as it moves around you must tap it at least 3 times to catch it you but you must be very quick to catch it otherwise it will get away. I just tap repeatedly on the ghost until I finally catch it because the ghost moves fast and you have only a few seconds to catch it. Hope this helps