Juanita
Make sure the laptop is OFF and disconnect the mains supply. A the top of the keyboard there is a flat plastic cover where the on/off button etc., is. At the right end of this cover there is a little slot/depression where the cover meets the side frame, put a fine screwdriver blade or similar point in the depression and GENTLY work it under the cover, it will rise at the right end. Then GENTLY work the cover upwards, this will release it from the catch at the left end. Remove the cover and locate the the connector of the wires leading from the keyboard to the chassis. Disconnect the plastic plug from the socket and then you can pop the keyboard out for cleaning.
When the keyboard and the bed underneath it is clean and dry, drop the keyboard back into place and make sure it is properly seated, reconnect the wires, and put the top cover back, first making sure that the left end fits well, then GENTLY press the rest into place, making sure that the tab at the right end clicks into place and the cover is flat and tight like before.
Take your time, and don't use any force.
Good Luck,
Bryan