The objective of this study is to examine the influence of wicking agents (peat moss, straw, jute and commercial absorbent pads) on the burning rate and efficiency during in-situ burning (ISB) in icy condition. The experiments are performed using water-in-oil mixtures formed by Alaska North Slope (ANS) crude oil with saltwater (salinity of 35 ppt) of varying composition in the range of 20% to 40%. The agent to mixture ratios are varied at 1:5, 1:10, and 1:20 by mass and the agent presoaking conditions are varied at 10 minutes presoaked and well-soaked. Results show that wicking agents influence the burning efficiencies in mixtures, with jute cloth showing the most promising results. The burning efficiency of 40% water-in-oil mixture is significantly improved from 0 to 79% with jute cloth as the agent, where the agent to mixture ratio is kept as 1:10 and the agent is well soaked. Other tested agents like peat moss having the same ratio only improve the efficiency to 29% with 40% water-in-oil mixture.