It is often understood that Sansevierias prefers to be in darker parts of a room. Yes, they will survive and keep growing in lower light conditions, but growth rate will not be as substantial as in bright light. A few hours in a window sill can make a big difference for a Sansevieria.
Drop in temperature is also unhealthy for the Snake Plant. They are native to a warm climate and cold can cause damage to the cell walls in the leaves. This interrupts the water and nutrients flow and inhibits water uptake through the roots.
The most essential care is limited watering. Let your Sansevieria dry out completely before you water again thoroughly. We would usually recommend every 2 weeks in the hotter months and during the winter months, let your plant rest for 6-7 weeks as this is their dormant period.
Problems
Yellowing and soft leaves - The most common issue for Sansevieria is root rot. For each watering make sure the water has run through the drainage holes and stopped dripping entirely. Avoid the plant sitting in water.
Leaves scarring, turning yellow and mushy - too cold
Browning tips - irregular watering or hard water area
Slow growth - dormant plant. Try to place your plant in some bright light a few hours of the day