You can finally remove the old leaves and continue watering until they have shrunk up into husks that resemble paper. Water the new bud softly to let it grow, then gradually increase the amount of water you give it until it receives full waterings as needed.
Your Lithops should enjoy a full life if you water them according to these instructions (40-50 years). Be mindful that some Lithops may only require watering three or four times each year. Others can be watered once or twice a week during their growing seasons (spring and autumn).
When it’s time to water, treat them like any other succulent by dousing the dirt at their base with water until water starts to run out of the bottom. If in doubt, wait to water until the leaves have noticeable wrinkling.
Any problems with thirst will still have plenty of time to be fixed before your plant suffers long-term harm. Water in the morning if you can. As a result, less damaging moisture is kept in the roots and the water can evaporate during the day.