Never swat or throw linens at the bat, or run around waving. All this tends to do is confuse the bat and leave you exhausted. If the bat refuses to leave, it will calm down and land on something. Drapes and hanging clothes seem to be the preferred rest areas. A more direct approach is to simply take it in a gloved hand then release it outside.
All bats can cling to surprisingly small surfaces.
For the bat's sake, do not use an overly thick glove when handling, remember this is not molten steel you are carrying. At last resort, local health authorities can be called to collect the bat, though this may result in it's demise. If the bat, or any wild animal, has come in contact with pets, children, invilids, etc. Health department recommendations vary from state to state. Occasionally big brown bats may overwinter in a building and arouse during warm weather in mid-winter or early spring.