Just make sure that the wick is in the oil, don't turn your lamp upside down. Let dry wicks soak for 20-30 minutes before lighting. The problem i have seen with leaving oil in a lamp long term the fuel can evaporate in the wick and get gummy which will make the wick stick in the bore of the burner assembly. Make sure that the wicks move freely before lighting, for safety take them outside for the first lighting.