I flew my spark today and when it was below 100m its vertical altitude kept on bouncing from .1-.2 is something wrong or is it just the wind? It has done this many times and tends to drift horizontally. Any suggestions would help. I am very close to stop flying this product.

at this height, the altitude is determined by the atmospheric pressure. This would be just a variation of the pressure due to wind.

If that happens again, video all the time or do a sohere photo.
To check if it is moving up and down that much and if it is drifting.
Moving clouds, that height, there is sometimes a moving seen, that is almost a rock steady position