public class MyModel {
	public Boolean FieldOne {get; set;}
	public Boolean FieldTwo {get; set;}
	public Boolean FieldThree {get; set;}
	public Boolean FieldFour {get; set;}
	public Boolean FieldFive {get; set;}
}

// current implementation
public class SomeBLClass {
	public NewModel MethodToCleanMyModel(MyModel model){
		if(FieldOne){
			SomeLogicOne();
		}
		if(FiendWto){
			SomeLogicTwo();
		}
		...
	}
}