Push down on the push button while inserting the connector into the hoop. Some hoops have a tighter connection than others. If it is too difficult to push the hoop together, you can loosen the tubing up with heat by heating that section of the hoop with a hair dryer or sticking one end in hot water. If using the hair dryer method on a taped hoop, be cautious of burning the tape.
Extreme weather is the enemy of a hoop. Cold temperatures makes polypro tubing brittle and more susceptible to cracking. On a hot day, your hoop is more likely to warp if left in your car. Be cautious when leaving your hoop in either conditions for an extended period of time.
A well loved hoop is bound to get dirty. You can clean it by wiping it down with soap and water or rubbing alcohol.