A method for improved hydrocarbon recovery from a formation due to cleanup of a residual viscous material, the method comprising the steps of: fracturing the formation with a fracturing fluid to generate fractures, the fracturing fluid comprising: a viscous fluid component, the viscous fluid component operable to increase the viscosity of the fracturing fluid and to fracture the formation to create the fractures leaving behind the residual viscous material in the fractures; a proppant component, the proppant component operable to hold open the fractures, wherein the proppant component is carried to the fractures by the viscous fluid component; and a cleanup fluid, the cleanup fluid comprising: at least one component comprising triacetin; and an exothermic reaction component operable to generate heat after the proppant component has been placed in the fractures, and the exothermic reaction component comprising at least one component selected from the group consisting of: urea, sodium hypochlorite, ammonium chloride, ammonium bromide, ammonium nitrate, ammonium sulfate, ammonium carbonate, ammonium hydroxide, sodium nitrite and potassium nitrite, wherein the heat is operable to reduce a viscosity of the residual viscous material to create a reduced viscosity material, the reduced viscosity material operable to flow from the formation. fracturing the formation with a fracturing fluid to generate fractures, the fracturing fluid comprising: a viscous fluid component, the viscous fluid component operable to increase the viscosity of the fracturing fluid and to fracture the formation to create the fractures leaving behind the residual viscous material in the fractures; a proppant component, the proppant component operable to hold open the fractures, wherein the proppant component is carried to the fractures by the viscous fluid component; and a viscous fluid component, the viscous fluid component operable to increase the viscosity of the fracturing fluid and to fracture the formation to create the fractures leaving behind the residual viscous material in the fractures; a proppant component, the proppant component operable to hold open the fractures, wherein the proppant component is carried to the fractures by the viscous fluid component; and a cleanup fluid, the cleanup fluid comprising: at least one component comprising triacetin; and an exothermic reaction component operable to generate heat after the proppant component has been placed in the fractures, and the exothermic reaction component comprising at least one component selected from the group consisting of: urea, sodium hypochlorite, ammonium chloride, ammonium bromide, ammonium nitrate, ammonium sulfate, ammonium carbonate, ammonium hydroxide, sodium nitrite and potassium nitrite, wherein the heat is operable to reduce a viscosity of the residual viscous material to create a reduced viscosity material, the reduced viscosity material operable to flow from the formation. at least one component comprising triacetin; and an exothermic reaction component operable to generate heat after the proppant component has been placed in the fractures, and the exothermic reaction component comprising at least one component selected from the group consisting of: urea, sodium hypochlorite, ammonium chloride, ammonium bromide, ammonium nitrate, ammonium sulfate, ammonium carbonate, ammonium hydroxide, sodium nitrite and potassium nitrite, wherein the heat is operable to reduce a viscosity of the residual viscous material to create a reduced viscosity material, the reduced viscosity material operable to flow from the formation. <EOS>