Max Ashton struck his first hat-trick for Mowbray to fire them to biggest win in three years.
Andrews started on the offensive, but Mowbray looked the likelier scorers with Cole Cunningham and Alfie Buckley pressuring the home defence and having chances to score.
Mowbray eventually broke the deadlock when Jack Bush’s solo run through the middle outfoxed the attempted offside trap. Bush then made it 2-0 with a fantastic finish from an acute angle.
Max Ashton capped the half with an excellent goal, Michael Orridge playing a super one-two to put him in prime position.
Keeper Euan Stevens had almost nothing to do as the defence of Jack Moulds, Alex Wainman, Benji Shilham and Joe Rodenby repelled all attacks.
Ashton, playing wide left, was unstoppable as he broke away several times and after two false starts added another goal.
The midfield of Orridge, Jacob Pope and Alex Giddings never looked like losing control, but Andrews pulled one back when a free-kick from 25 yards out was comfortably headed in.
Ashton then missed what seemed an easy opportunity for his third, but made amends by creating and finishing for his hat-trick.
Joe Rodenby powerfully headed in from a corner and soon after Harry Street outpaced the defence and finished superbly for 7-0.
Cunningham finally made the scoresheet with a well-taken strike to complete the rout.