The cost of home heating oil in Maine has inched up two cents in the past week to an average of $3.70 per gallon. The Governor’s Energy Office announced Tuesday that current prices are 26 cents per gallon higher than at the same time last year. The lowest prices are in the southwest area of the state where the average is $3.63 per gallon. Prices are highest in the northern reaches of Maine, where prices are at an average of $3.86 per gallon. The office found heating oil as low as $3.50 per gallon in some areas. The highest price was $3.93. The statewide kerosene price average is $4.14 per gallon, up four cents from last week.