black dots or stains on the bedding especially in the corners of the mattress and box-springs under the braiding that seams them together. i do this before i bring my suit cases out of the bath tub. if you find ball point pen black looking stains around the corners of the mattress or on the bedding in that area leave with your bags immediately. ask for a new room.
#3 unpack suit cases and all travel items away from the house when you get home. in the driveway is the best, garage or bath room with rugs removed.
# 4 wash everything in hot water or run it through the hot dryer 