If your printer is not printing in grayscale consistently, here are some steps that may help resolve the issue:

1. Ensure that your printer is on the correct settings for grayscale printing.
2. Check ink or toner supplies and replentish if necessary.
3. Verify settings in the Print Properties, Select Advanced Properties.
4. Check printer preferences to ensure that grayscale printing is selected.
5. Consult the printer manual for further troubleshooting assistance.