Keep your Hoya Kerrii away from draughty spots and radiators to keep it happy. If you place your succulent in direct sunlight during Summer, the colour of the leaf can begin to fade and turn yellow, dappled light is best.
When watering, avoid the leaves and water the soil directly. The Hoya Kerrii doesn’t like to have soggy feet, as this can lead to root rot. If you suspect there’s too much water in the bottom of the pot, drain off any excess off & let the soil dry out.