hello LILass, my name is Marianne on behalf of Nexgrill. I am sorry to hear you didn't like the assembly of the parts in the box. We highly recommend to keep unit covered when it is not in use and to season the cooking grids by using any type of oil before using the grill. And you can Zep cleaner available in home depot to remove rust spots. if you are experience any issues with temperature, please make sure you are using 20 LP .You may be experiencing pressure issues and your regulator may need to be reset.
Reset Regulator Instructions
1. Turn all the knobs and tank to the off position
2. Disconnect the regulator from the tank
3. Turn on all main burners, just as if lighting the grill normally and set to high
4. Let this sit from 10-15 minutes untouched
5. Once allotted time has elapsed, make sure all knobs are turned to the off position
6. Reconnect your propane regulator gas hose to the propane tank
7. Slowly open the tank all the way (30 Seconds).
if you have any issue please call us on 800-913-8999 or email me at marianne_Zaki@grillservies.com. I hope you enjoy your day!!