Firstly, are you sure they are carpet moths and not clothes moths? They can look very similar. Carpet Moths can be persistent household pests and a continual prevention regime is advisable. Warmer weather combined with centrally heated homes has led to carpet moth infestations becoming a year-round problem.
Carpet moths inhabit less disturbed and darker areas – behind sofas, along skirting boards, under bookcases are typical hiding places for carpet moth larvae. Regular vacuuming in these areas, moving furniture and opening curtains in lesser-used rooms will all help to create a less desirable environment for carpet moths to settle and cause subsequent expensive damage.
Use a thorough treatment routine to ensure the carpet moths are completely eradicated, as follows:
1. CLEAN - Move furniture away from edges of the carpet and thoroughly vacuum (both sides if possible) also paying particular attention to under furniture and along skirting boards
2. KILL - After an initial powder treatment and further vacuuming, spray the carpet deep into the pile to kill any eggs and / or larvae. For severe infestations, Fumers will be required.
3. MONITOR AND REFRESH - Place moth traps close to affected areas to monitor for adult moths and to break the breeding cycle. Keep moth traps current and consider respraying regularly – please remember, with warmer houses carpet moth damage and infestations are now a year-round problem
Further help and advice can be found at
http://www.mothprevention.com