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The interaction of defects can lead to a phenomenon of erasure. During thisprocess, a lower-dimensional object gets absorbed and dissolved by ahigher-dimensional one. The phenomenon is very general and has a wide range ofimplications, both cosmological and fundamental. In particular, all types ofstrings, such as cosmic strings, QCD flux tubes, or fundamental strings, geterased when encountering a defect, either solitonic or a $D$-brane thatdeconfines their fluxes. This leads to a novel mechanism of cosmic stringbreak-up, accompanied by gravitational and electromagnetic radiations. Thearguments based on loss of coherence and the entropy count suggest that theerasure probability is very close to one, and strings never make it through thedeconfining layer. We confirm this by a numerical simulation of the system,which effectively captures the essence of the phenomenon: a $2+1$-dimensionalproblem of interaction between a Nielsen-Olesen vortex of a $U(1)$ Higgs modeland a domain wall inside which the $U(1)$ gauge group is unHiggsed and themagnetic flux is deconfined. In accordance with the entropy argument, in oursimulation, the vortex never makes it across the wall.

Erasure of Strings and Vortexes