There are several heat-free styling methods you can use to maintain and style your lace front wigs without the need for heat tools. Here are some techniques:

1. Finger Coiling:
   - For wavy or curly lace front wigs, you can use your fingers to gently shape the curls or waves. Simply run your fingers through the hair, pinching sections to create the desired curl or wave shape.

2. Scrunching:
   - This technique is great for enhancing natural curls or waves. Gently scrunch the hair in your hands, using a light hold product like a mousse or curl-enhancing cream to help set the style.

3. Pineappling:
   - To maintain curls or waves overnight, gather your hair on top of your head and secure it with a scrunchie or clip, known as "pineappling." This helps to preserve the style while you sleep.

4. Silk or Satin Pillowcases:
   - Using a silk or satin pillowcase can reduce friction on your lace front wigs while you sleep, helping to maintain its shape and reduce frizz.

5. Braiding or Twisting:
   - Braiding or twisting the hair before bed can help maintain the wave pattern. This is especially useful for deep wave lace front wigs, as it can help to enhance the natural wave shape.

6. Wet Styling:
   - Apply a light hold gel or mousse to the lace front wigs when it's damp, then style it into the desired shape. Allow it to air dry or use a hooded dryer to speed up the process.

7. Ponytail or Bun:
   - For a quick and easy style, gather the hair into a high ponytail or bun. This can be a chic and practical look that requires no heat.

8. Flexi Rods or Spirals:
   - These are small, flexible rods that can be rolled into the hair to create curls or waves. They are left in the hair for a period of time to set the style.

9. Spray and Go:
   - For a simple refresh, use a spray bottle with water and a small amount of leave-in conditioner or hair oil. Lightly mist the lace front wigs and then use your fingers to shape the waves or curls.

10. Use of lace front wigs Brushes:
    - A lace front wigs brush or wide-tooth comb can be used to gently detangle and style the lace front wigs, especially when it's slightly damp.

Remember, when using any styling products, always choose those that are alcohol-free to avoid drying out the lace front wigs fibers. Also, handle your lace front wigs gently to avoid causing damage or tangling. Regular maintenance, such as washing and conditioning, will also help keep your lace front wigs looking its best without the need for heat styling.