Before starting a project using solvents in a confined space (i.e., furniture stripping), open a window or use fans. Turn off your water heater, furnace or other heating appliance. Paint, varnish or glue can give off volatile fumes. Fumes and open flames do not mix!
If the fumes come into contact with any heat source, there could be an explosion. And never use gasoline as a solvent. While it may work for certain cleaning tasks, it is highly flammable. Even the friction from rubbing a surface can cause an explosion. Instead, use a solvent meant for the job.
And when you put your barbecue away in the fall, don’t store it together with the propane cylinder in a garage. The propane cylinder should be stored outside, at least a metre away from any opening to the building.