A picture of the entire enclosure would help.
You don't need both a heat cord and lamps. One heat source (one lamp or a heat cord) is plenty as long as it's placed in the right location at one side of the cage (at the top - light or bottom - heat cord). If the water is warm to touch then this suggests that the enclosure is too hot. Snakes need a cool area so they can regulate their body temperature, they don't need to be warm all the time.The snake needs a heat gradient with a hot end of between 32 and 35 deg C at the basking spot and a cool end of between 20 & 22 deg C. This way they can move between the basking spot to warm up to their desired body temperature and retreat to a cool area and chill out. Overheating can lead to dehydration which in turn leads to shedding problems. 70% humidity seems pretty high and again this could be a result of the enclosure being too hot.
It's not uncommon for snakes to soak. They might get in the water to get some relief from heat and are also known to soak to relieve the irritation which is consistent with a mite infestation. From the pic it doesn't appear to have mite but, as suggested, a check around the eyes and labial (heat) pits would give you a better idea. Either way, the water bowl for soaking needs to be much bigger for it to be able to fit in comfortably. A good idea is to provide two water bowls, a small one that can be topped up with fresh water to drink from and a larger one to soak.
Also, as suggested, it would be a good idea to get rid of that substrate and replace it with something more suitable.
Do you have a hide in the enclosure for it to retreat and cool down and get away from the light? From the photo it looks like it's in the water to cool down and hiding it's head to get some relief from exposure to the light. They need a hide where they can coil up and feel secure and the hide is best placed at the cooler end of the enclosure. Lights, even if they provide the heat source, only need to be on for around 12 hours a day and should be connected to a thermostat to regulate the optimum temperature. The probe for the thermostat should be placed directly at the basking spot.
No need to panic the snake looks to be healthy but, from the pic, the separation between the scales indicates the snake appears to be well over weight which could prove detrimental to it's health in the long term so it mightn't hurt to scale back the size and/or frequency of feeding.
Hope this helps,
George.