Methods of cleaning a hot gas flowpath component of a turbine engine

A method of cleaning a hot gas flowpath component of a turbine engine, the method comprising:

• cleaning a hot gas flowpath component by introducing an acid-including detergent with a pH range of between 2 and 7 into a hot gas flowpath of an at least partially assembled turbine engine and onto at least one hot gas flowpath component forming at least a portion of the hot gas flowpath having a layer of accumulated contaminants thereon to clean the accumulated contaminants from the at least one component;
• wherein the detergent comprises a first organic acidic component including citric acid within a range between about 0.1 percent and about 15 percent by volume of the detergent and at least one of isoropylamine sulphonate within a range between about 0.07 percent and 0.14 percent by volume of the detergent, alcohol ethoxylate within a range between about 0.035 percent and 0.07 percent by volume of the detergent, triethanol amine within a range between about 0.035 percent and 0.07 percent by volume of the detergent, or lauriminodipropionate within a range between about 0.03 percent and 1.0 percent by volume of the detergent.