| because of water condensation on internal surfaces | 6 | cause |
| pretty | 5 | degree |
| on the inside | 4 | location |
| lens → be → dirty | 38 |
| lens → get → dirty | 9 |
| lens → become → dirty | 4 |
| negative | neutral | positive |
| 0.684 | 0.294 | 0.022 |
| Raw frequency | 51 |
| Normalized frequency | 0.597 |
| Modifier score | 1.000 |
| Perplexity | 381.494 |