Our attic was completely infested with moths when we moved in and our clothes eaten to shreds. I have used moth traps from John Lewis or Amazon ever since - Demi-Diamond Moth Trap. I replace the sticky papers every couple of months in summer and have one in each area where clothes are stored. It's best to put them where air circulates. I've had great success and I hope you do too. 

Have just found my third jumper in as many weeks full of holes. Has never been a problem until now. Have been googling and seen that lavender bags and cedar balls are both good things to use. Should I be doing anything else? Very grateful for any help.