Tech arrived for a free second opinion. The customer recieved a recommendation from Milestone indicating that the customer needed duct cleaning. The customer had a level 1 duct cleaning in Dec of 2020. The customer wanted the ducts and previous work evaluated. The return ducts were a little dirty. The coil and blower area was also dirty. The coil and blower cleaning is not included in the level 1 duct cleaning. There are many factor that can contribute to dust in the return ductwork. There was no observed indication that the previous work was not performed as intended. Invoice was reviewed and service fee was removed.