Wudhu shall break if drops come while making wudhu, as well as salah will be invalid if it comes during the salah. It shall be mandatory to make fresh wudhu and reoffer the salah. However, if the dispersion of the drops on the cloth is not equal to the depth of the palm then it is allowable to offer salah without washing the cloth. When you have the problem of drops then it is better for you to complete the process of istinja before making wudhu and make it sure by coughing or walking or lying on your right or left side or in any way so that the drops do not come any more, and then make wudhu after some time.
Allah knows Best!
Darul Uloom Deoband