Generally speaking, there are several aspects to maintain SFP transceivers.
1. Optical port protection. Keep the end face clean; avoid prolonged exposure the SFP port in the air; avoid scratching the end face or sleeve, etc.
2. Use the SFP module correctly. Keep the optical transceiver work in the normal level; plug and insert the SFP transceiver gently to reduce accidental damage
3. Keep the using environmental humidity of SFP transceiver is normal.