In most cases, smudging is due to the operation of the printer below the stated
minimum 20 percent relative humidity. This often occurs in the winter when
dry, cool air is brought inside and warmed up. Because of the latent humidity
in the printer, paper, and toner cartridge, it takes approximately 24 hours
for a change in humidity to reflect in the results. The condition of the
printer, paper, and toner can all have a significant impact on the print
quality. Changing parts or modules has no effect on a humidity-related problem.
Here are some suggestions for minimizing smudging:
* Use a humidifier in the vicinity of the printer and its paper. Try to
maintain the humidity at a level of 40 to 70 percent.
* Place a moist sponge with the paper supply in a closed container (like
sealed cabinet.) This does not control the humidity level within the
printer or toner. This method, therefore, has limited effectiveness.
* Before inserting paper into the paper cassette, use a static-dissipating
spray (e.g., Static Guard¬.)
* Clean the printer regularly to reduce toner deposits in accordance with the
"Owner's Guide" recommendations.
In conclusion, the best solution is to operate the printer within its
specified humidity range.