Grease,  excess paint,  etc. can affect the quality of collected vibration data. The below 3 steps will ensure that the best possible data quality is always collected:

1. Always carry a rag, scraper, brush, etc. to clean each measurement location before acquiring vibration data.
2. Make sure that the measurement surface is flat and the sensor is not rocking during data collection.
3. Hold the cable during data acquisition to prevent movement that may induce electrical noise and affect measurement quality.

Learn about the Triboelectric effect on vibration accelerometers