1. Maintaining a correct level of pea-gravel or sand (soft landing area) around a Jumping Pillow is most important.

a) safety reasons - edges should never be exposed, b) pillow operation - not enough sand (weight) in the trench, can cause a pillow to lift more than normally, especially shortly after installation. It may also cause some air loss.

The sand/pea gravel must be maintained at all times at a minimum level of 4 inches thick. In other words, the sand must always be 4 inches above the pillows edge (see drawing). This 4+ inch level of sand/pea gravel is also a minimum requirement by some of the insurance companies. If you would like, you can use more than 4 inches of sand/pea gravel above the edge. This will minimise your maintenance intervals. Please do not put the sand/pea gravel higher than "no jumping near edge" sign and remember not to block the air vent.

2. In case of a puncture, you can glue the patch on top of the canvas or under it. Any PVC glue should be fine. 
Patch on top: a) deflate the pillow, b) clean both surfaces with methylated spirit, c) cut the patch in a round shape, 
d) apply glue to both surfaces, e) contact both surfaces and apply weight, f) follow the glue manufacturer instruction for drying time. Patch under the canvas will look and perform better. Same procedure as above, except you may need to enlarge the hole to put the patch through, as well as a piece of cardboard to make contacting easier.

3. If the pillow fails to inflate, please check: a) any obstructions on top of the air vent like sand, water etc. b) check the electric blower / power supply. c) check for water in the air pipe - it is rare, but possible to flood the air pipe, especially after a very heavy rain, storm etc. When the ground can not absorb the water fast enough, it is possible for the water to rise under the canvas, pour into the air vent and flood the air pipe. It can be cleared by sucking the water out or by blowing it out with a garden (leaf) blower.

4. If a pillow is losing bounce or is becoming noticeably softer: a) check for air pipe/vent obstructions, b) check for correct sand level around the pillow, c) check for a hole(s) in the canvas, d) check the blower, e) check voltage - if it falls below 110V the motor will slow down (loss of rpm / decrease in air volume). Please note that pillow bounce can and will vary from pillow to pillow. It depends on the soil, size of the pillow, air temperature, length of the air pipe etc.
In general if you are able to jump, the pillow is fine.

5. If pillow becomes very dirty due to use / sometimes due to chemicals used to wash sand, try: A citrus based cleaner,