I like to clean the grill right after use. This allows for the grate to still be very hot which makes for easier cleaning. Any grill cleaning bruch will do but I tend to use one with the scraper on both sides.
This video gives some good tips and is easy to follow
http://www.howcast.com/videos/13557-How-To-Clean-a-Gas-Grill-With-Minimal-Effort
First you need to clean the grates with a good wire brush and then use the wire brush to clean out the inside of the grill. After your grill is scraped out it might be a good idea to wash it out as well.
To clean a propane grill effectively, start by heating the grill to high to burn off any residue. Then, scrub the grates with a grill brush and clean the exterior with warm, soapy water. Finally, rinse and dry the grill thoroughly before using it again.
Clean your Weber barbecue grill grates after each use. Use a grill brush to remove food particles while the grill is still hot. This way you'll always have clean grill grates for the next time you want to grill food. Before barbecuing, brush the clean grates with a light coating of vegetable oil, and foods will not stick.
An important step to take before using an outdoor barbecue is to clean the racks on the inside. This is most easily done by preheating the grill to loosen debris and then using a grill brush to dislodge anything that is still sticking to the rack. The grill will be easier to clean if the rack on the inside is regularly oiled before food is placed on it. A clean outdoor barbecue rack will provide food that has a better taste and that is healthier.
Keeping your BBQ grill clean can sometimes be a hassle. However, ensuring that your BBQ grill will always be clean is certain to keep your meat nice and tasty. One great tip to keeping your grill clean is by having a grill scraper handy when you are cooking. Scraping all of the leftover dried-out grease will certainly keep your BBQ grill looking great and ready to cook whenever you want.
To clean a propane grill effectively and efficiently, start by heating the grill on high for 10-15 minutes to burn off any residue. Then, scrub the grates with a grill brush and wash them with warm, soapy water. Clean the exterior with a mild cleaner and a cloth. Finally, empty the grease trap and clean it with warm, soapy water. Repeat these steps regularly to maintain a clean grill.
If you're very very good about cleaning all the ash out after use, then cleaning and oiling the grill, you can probably get the same use out of a cast iron grill of a similar guage. However, if you don't clean out the ash (which is quite alkaline), you can corroded out a cast grill more easily than stanless.
Clean the filter Wipe down the grill and exterior Dust off the fins and coils Clean out the tray and drain Reassemble and spray cleaner on your unit
A grill brush can be sleaned with warm soapy water. Keeping all cooking areas clean is important for safety.
clean grill
A good tip to avoid barbecue grill grating is firstly ensuring that you have a clean grate to use. A clean grill will not only produce better tasting food it will also last longer.
Onion is used to clean the grill top. When you are finished cooking, and while the grill is still very hot, cut an onion in half, press a fork into the top part of the onion, and run the cut side of the onion along the grill top, all over the grill. This will usually clean the food particles off the grill. Many people use this method to clean their grills rather than use a wire brush.