I Am Testing Ecosoy135. Burning A Plain Unscented, Uncolored, It Is Fine. Then, I Have A Colored One With No Scent, Then I Have A Colored And Scented One. My Question Is....how Long Do I Need To Wait To Test Burn The One With Scent And Color In It? I Am Mostly Testing For The Burn Properties And Not Scent Throw At This Time. Thanks