I bought this echeveria about two and half weeks ago from a local nursery. I watered it twice last week. Normally i would water it once a week. Since the time i watered it the bottom leaves feel very soft and slightly mushy. Can you tell me what to do to make sure it doesn't die? I dont see any new growth and when i repotted it i found a few very tiny mealy bugs in the roots. What can i do to get rid of them? I thought of dipping the roots in soap water but given that it's suffering from over watering already, it didn't seem ideal to do that. I've placed it in direct sun for 4days now hoping it would help the leaves become normal again. Also, how do i clean the leaves? They have some dirt stuck to them.
The picture shows over watering and low phosphorus. Do not do anything with cleaning the roots, please. Do not water until the pot and plant FEELS lighter than when watered. The difference in weight is very distinctive. Do not water until that pot and soil feel light. Do not water on any schedule. This is a succulent that stores water and even the tiniest bit of too much water will cause rot.
Are you fertilizing with a balanced NPK fertilizer? Too low on phosphorus screams you have not fertilized. Is this potting soil, sterilized potting medium? Did you try to enhance drainage by putting gravel or rocks over the drainage hole at the bottom of the pot before you installed the soil and plant? Very big problem if you did and I'd love to explain to you perched water tables.
This looks to me like over watering and too low on Macro nutrients. No soil even 'rich dark juicy soil' will ever have the proper amounts of NPK and micro nutrients. Pfft, unless someone added fertilizer to a bag of potting soil. Don't buy potting soil with fertilizer added or those water holding gimmicks such as sponges and gels!
The color of the leaves denotes phosphorous deficiency. Tells me that you have not used any fertilizer? Up pot this plant using ONLY sterilized potting soil into a 4" or 6" diameter pot. More shallow than wide, clay is best. Use half the directed amount of fertilizer in the directions of an all purpose fertilizer...such as Osmocote 14-14-14 extended release. Once or twice per year is enough to provide the chemistry plants have to have to do photosynthesis to make THEIR OWN FOOD. Fertilizer is not food. Compost is not fertilizer nor is it a soil replacement. How much light does this plant get? What window? Don't be moving this plant out of its normal habitat, its normal spot in the light without some direction on acclimation of plants.
Insects will be showing up when you have a weakened and dying plant. Don't worry about them right now, they are not your problem. They are a secondary problem easily controlled with NEEM (read those directions!!)